CVE-2024-6387 (GCVE-0-2024-6387)
Vulnerability from cvelistv5
Published
2024-07-01 12:37
Modified
2025-11-11 16:12
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-364 - Signal Handler Race Condition
Summary
A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.
References
| ► | URL | Tags | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ► |
Version: 8.5p1 < |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2024-6387",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-07-02T13:18:34.695298Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-07-02T13:18:46.662Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-04-24T18:35:27.934Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://www.vicarius.io/vsociety/posts/regresshion-an-openssh-regression-error-cve-2024-6387"
},
{
"url": "https://www.exploit-db.com/exploits/52269"
},
{
"url": "https://packetstorm.news/files/id/190587/"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/12"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/01/13"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/02/1"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/1"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/11"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/2"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/3"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/4"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/03/5"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/04/1"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/04/2"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/08/2"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/08/3"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/09/2"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/09/5"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/1"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/2"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/3"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/4"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/10/6"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/11/1"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/11/3"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/23/4"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/23/6"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/28/2"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/07/28/3"
},
{
"name": "RHSA-2024:4312",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4312"
},
{
"name": "RHSA-2024:4340",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4340"
},
{
"name": "RHSA-2024:4389",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4389"
},
{
"name": "RHSA-2024:4469",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4469"
},
{
"name": "RHSA-2024:4474",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4474"
},
{
"name": "RHSA-2024:4479",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4479"
},
{
"name": "RHSA-2024:4484",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4484"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/security/cve/CVE-2024-6387"
},
{
"tags": [
"x_transferred"
],
"url": "https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/"
},
{
"tags": [
"x_transferred"
],
"url": "https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/"
},
{
"tags": [
"x_transferred"
],
"url": "https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server"
},
{
"name": "RHBZ#2294604",
"tags": [
"issue-tracking",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294604"
},
{
"tags": [
"x_transferred"
],
"url": "https://explore.alas.aws.amazon.com/CVE-2024-6387.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://forum.vmssoftware.com/viewtopic.php?f=8\u0026t=9132"
},
{
"tags": [
"x_transferred"
],
"url": "https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/AlmaLinux/updates/issues/629"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/Azure/AKS/issues/4379"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/PowerShell/Win32-OpenSSH/discussions/2248"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/PowerShell/Win32-OpenSSH/issues/2249"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/microsoft/azurelinux/issues/9555"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/oracle/oracle-linux/issues/149"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/rapier1/hpn-ssh/issues/87"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/zgzhang/cve-2024-6387-poc"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.almalinux.org/archives/list/announce@lists.almalinux.org/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY/"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://news.ycombinator.com/item?id=40843778"
},
{
"tags": [
"x_transferred"
],
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010"
},
{
"tags": [
"x_transferred"
],
"url": "https://santandersecurityresearch.github.io/blog/sshing_the_masses.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://security-tracker.debian.org/tracker/CVE-2024-6387"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20240701-0001/"
},
{
"tags": [
"x_transferred"
],
"url": "https://sig-security.rocky.page/issues/CVE-2024-6387/"
},
{
"tags": [
"x_transferred"
],
"url": "https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/"
},
{
"tags": [
"x_transferred"
],
"url": "https://ubuntu.com/security/CVE-2024-6387"
},
{
"tags": [
"x_transferred"
],
"url": "https://ubuntu.com/security/notices/USN-6859-1"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.openssh.com/txt/release-9.8"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.suse.com/security/cve/CVE-2024-6387.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.theregister.com/2024/07/01/regresshion_openssh/"
},
{
"tags": [
"x_transferred"
],
"url": "https://support.apple.com/kb/HT214119"
},
{
"tags": [
"x_transferred"
],
"url": "https://support.apple.com/kb/HT214118"
},
{
"tags": [
"x_transferred"
],
"url": "https://support.apple.com/kb/HT214120"
},
{
"tags": [
"x_transferred"
],
"url": "http://seclists.org/fulldisclosure/2024/Jul/20"
},
{
"tags": [
"x_transferred"
],
"url": "http://seclists.org/fulldisclosure/2024/Jul/18"
},
{
"tags": [
"x_transferred"
],
"url": "http://seclists.org/fulldisclosure/2024/Jul/19"
}
],
"title": "CVE Program Container",
"x_generator": {
"engine": "ADPogram 0.0.1"
}
}
],
"cna": {
"affected": [
{
"collectionURL": "https://www.openssh.com/",
"defaultStatus": "unaffected",
"packageName": "OpenSSH",
"repo": "https://anongit.mindrot.org/openssh.git",
"versions": [
{
"lessThanOrEqual": "9.7p1",
"status": "affected",
"version": "8.5p1",
"versionType": "custom"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:9::baseos",
"cpe:/a:redhat:enterprise_linux:9::appstream"
],
"defaultStatus": "affected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:8.7p1-38.el9_4.1",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:9::baseos",
"cpe:/a:redhat:enterprise_linux:9::appstream"
],
"defaultStatus": "affected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:8.7p1-38.el9_4.1",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:rhel_e4s:9.0::baseos",
"cpe:/a:redhat:rhel_e4s:9.0::appstream"
],
"defaultStatus": "affected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:8.7p1-12.el9_0.1",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:rhel_eus:9.2::baseos",
"cpe:/a:redhat:rhel_eus:9.2::appstream"
],
"defaultStatus": "affected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 9.2 Extended Update Support",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:8.7p1-30.el9_2.4",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift:4.13::el9",
"cpe:/a:redhat:openshift:4.13::el8"
],
"defaultStatus": "affected",
"packageName": "rhcos",
"product": "Red Hat OpenShift Container Platform 4.13",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "413.92.202407091321-0",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift:4.14::el9",
"cpe:/a:redhat:openshift:4.14::el8"
],
"defaultStatus": "affected",
"packageName": "rhcos",
"product": "Red Hat OpenShift Container Platform 4.14",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "414.92.202407091253-0",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift:4.15::el8",
"cpe:/a:redhat:openshift:4.15::el9"
],
"defaultStatus": "affected",
"packageName": "rhcos",
"product": "Red Hat OpenShift Container Platform 4.15",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "415.92.202407091355-0",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:openshift:4.16::el9"
],
"defaultStatus": "affected",
"packageName": "rhcos",
"product": "Red Hat OpenShift Container Platform 4.16",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "416.94.202407081958-0",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ceph_storage:5"
],
"defaultStatus": "unaffected",
"packageName": "openssh",
"product": "Red Hat Ceph Storage 5",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ceph_storage:6"
],
"defaultStatus": "unaffected",
"packageName": "openssh",
"product": "Red Hat Ceph Storage 6",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ceph_storage:7"
],
"defaultStatus": "unaffected",
"packageName": "openssh",
"product": "Red Hat Ceph Storage 7",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:10"
],
"defaultStatus": "affected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 10",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:6"
],
"defaultStatus": "unaffected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 6",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:7"
],
"defaultStatus": "unaffected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 7",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:8"
],
"defaultStatus": "unaffected",
"packageName": "openssh",
"product": "Red Hat Enterprise Linux 8",
"vendor": "Red Hat"
}
],
"credits": [
{
"lang": "en",
"value": "Red Hat would like to thank Qualys Threat Research Unit (TRU) (Qualys) for reporting this issue."
}
],
"datePublic": "2024-07-01T08:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A security regression (CVE-2006-5051) was discovered in OpenSSH\u0027s server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Important"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-364",
"description": "Signal Handler Race Condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-11-11T16:12:24.347Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"name": "RHSA-2024:4312",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4312"
},
{
"name": "RHSA-2024:4340",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4340"
},
{
"name": "RHSA-2024:4389",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4389"
},
{
"name": "RHSA-2024:4469",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4469"
},
{
"name": "RHSA-2024:4474",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4474"
},
{
"name": "RHSA-2024:4479",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4479"
},
{
"name": "RHSA-2024:4484",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:4484"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2024-6387"
},
{
"name": "RHBZ#2294604",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294604"
},
{
"url": "https://santandersecurityresearch.github.io/blog/sshing_the_masses.html"
},
{
"url": "https://www.openssh.com/txt/release-9.8"
},
{
"url": "https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt"
}
],
"timeline": [
{
"lang": "en",
"time": "2024-06-27T00:00:00+00:00",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2024-07-01T08:00:00+00:00",
"value": "Made public."
}
],
"title": "Openssh: regresshion - race condition in ssh allows rce/dos",
"workarounds": [
{
"lang": "en",
"value": "The below process can protect against a Remote Code Execution attack by disabling the LoginGraceTime parameter on Red Hat Enterprise Linux 9. However, the sshd server is still vulnerable to a Denial of Service if an attacker exhausts all the connections.\n\n1) As root user, open the /etc/ssh/sshd_config\n2) Add or edit the parameter configuration:\n~~~\nLoginGraceTime 0\n~~~\n3) Save and close the file\n4) Restart the sshd daemon:\n~~~\nsystemctl restart sshd.service\n~~~\n\nSetting LoginGraceTime to 0 disables the SSHD server\u0027s ability to drop connections if authentication is not completed within the specified timeout. If this mitigation is implemented, it is highly recommended to use a tool like \u0027fail2ban\u0027 alongside a firewall to monitor log files and manage connections appropriately.\n\nIf any of the mitigations mentioned above is used, please note that the removal of LoginGraceTime parameter from sshd_config is not automatic when the updated package is installed."
}
],
"x_redhatCweChain": "CWE-364: Signal Handler Race Condition"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2024-6387",
"datePublished": "2024-07-01T12:37:25.431Z",
"dateReserved": "2024-06-27T13:41:03.421Z",
"dateUpdated": "2025-11-11T16:12:24.347Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.vicarius.io/vsociety/posts/regresshion-an-openssh-regression-error-cve-2024-6387\"}, {\"url\": \"https://www.exploit-db.com/exploits/52269\"}, {\"url\": \"https://packetstorm.news/files/id/190587/\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/01/12\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/01/13\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/02/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/11\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/04/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/04/2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/08/2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/08/3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/09/2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/09/5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/10/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/10/2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/10/3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/10/4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/10/6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/11/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/11/3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/23/4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/23/6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/28/2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/28/3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4312\", \"name\": \"RHSA-2024:4312\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4340\", \"name\": \"RHSA-2024:4340\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4389\", \"name\": \"RHSA-2024:4389\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4469\", \"name\": \"RHSA-2024:4469\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4474\", \"name\": \"RHSA-2024:4474\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4479\", \"name\": \"RHSA-2024:4479\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4484\", \"name\": \"RHSA-2024:4484\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2024-6387\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://archlinux.org/news/the-sshd-service-needs-to-be-restarted-after-upgrading-to-openssh-98p1/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://arstechnica.com/security/2024/07/regresshion-vulnerability-in-openssh-gives-attackers-root-on-linux/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion-remote-unauthenticated-code-execution-vulnerability-in-openssh-server\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2294604\", \"name\": \"RHBZ#2294604\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\", \"x_transferred\"]}, {\"url\": \"https://explore.alas.aws.amazon.com/CVE-2024-6387.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://forum.vmssoftware.com/viewtopic.php?f=8\u0026t=9132\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2024-002.txt.asc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/AlmaLinux/updates/issues/629\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/Azure/AKS/issues/4379\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/PowerShell/Win32-OpenSSH/discussions/2248\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/PowerShell/Win32-OpenSSH/issues/2249\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/microsoft/azurelinux/issues/9555\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/openela-main/openssh/commit/e1f438970e5a337a17070a637c1b9e19697cad09\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/oracle/oracle-linux/issues/149\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/rapier1/hpn-ssh/issues/87\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/zgzhang/cve-2024-6387-poc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.almalinux.org/archives/list/announce@lists.almalinux.org/thread/23BF5BMGFVEVUI2WNVAGMLKT557EU7VY/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.mindrot.org/pipermail/openssh-unix-dev/2024-July/041431.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://news.ycombinator.com/item?id=40843778\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0010\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://santandersecurityresearch.github.io/blog/sshing_the_masses.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security-tracker.debian.org/tracker/CVE-2024-6387\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240701-0001/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://sig-security.rocky.page/issues/CVE-2024-6387/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://stackdiary.com/openssh-race-condition-in-sshd-allows-remote-code-execution/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://ubuntu.com/security/CVE-2024-6387\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://ubuntu.com/security/notices/USN-6859-1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.akamai.com/blog/security-research/2024-openssh-vulnerability-regression-what-to-know-and-do\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisory/19904-security-advisory-0100\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.freebsd.org/security/advisories/FreeBSD-SA-24:04.openssh.asc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.openssh.com/txt/release-9.8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.splunk.com/en_us/blog/security/cve-2024-6387-regresshion-vulnerability.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.suse.com/security/cve/CVE-2024-6387.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.theregister.com/2024/07/01/regresshion_openssh/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://support.apple.com/kb/HT214119\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://support.apple.com/kb/HT214118\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://support.apple.com/kb/HT214120\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2024/Jul/20\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2024/Jul/18\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2024/Jul/19\", \"tags\": [\"x_transferred\"]}], \"x_generator\": {\"engine\": \"ADPogram 0.0.1\"}, \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-04-24T18:35:27.934Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-6387\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-02T13:18:34.695298Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-02T13:18:43.278Z\"}}], \"cna\": {\"title\": \"Openssh: regresshion - race condition in ssh allows rce/dos\", \"credits\": [{\"lang\": \"en\", \"value\": \"Red Hat would like to thank Qualys Threat Research Unit (TRU) (Qualys) for reporting this issue.\"}], \"metrics\": [{\"other\": {\"type\": \"Red Hat severity rating\", \"content\": {\"value\": \"Important\", \"namespace\": \"https://access.redhat.com/security/updates/classification/\"}}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"repo\": \"https://anongit.mindrot.org/openssh.git\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.5p1\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"9.7p1\"}], \"packageName\": \"OpenSSH\", \"collectionURL\": \"https://www.openssh.com/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:enterprise_linux:9::appstream\", \"cpe:/o:redhat:enterprise_linux:9::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:8.7p1-38.el9_4.1\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:enterprise_linux:9::appstream\", \"cpe:/o:redhat:enterprise_linux:9::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:8.7p1-38.el9_4.1\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhel_e4s:9.0::appstream\", \"cpe:/o:redhat:rhel_e4s:9.0::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:8.7p1-12.el9_0.1\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_eus:9.2::baseos\", \"cpe:/a:redhat:rhel_eus:9.2::appstream\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9.2 Extended Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:8.7p1-30.el9_2.4\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4.13::el9\", \"cpe:/a:redhat:openshift:4.13::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4.13\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"413.92.202407091321-0\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhcos\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4.14::el8\", \"cpe:/a:redhat:openshift:4.14::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4.14\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"414.92.202407091253-0\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhcos\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4.15::el8\", \"cpe:/a:redhat:openshift:4.15::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4.15\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"415.92.202407091355-0\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhcos\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4.16::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4.16\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"416.94.202407081958-0\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhcos\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:ceph_storage:5\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Ceph Storage 5\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:ceph_storage:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Ceph Storage 6\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:ceph_storage:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Ceph Storage 7\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 10\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 6\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 7\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"packageName\": \"openssh\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2024-06-27T00:00:00+00:00\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2024-07-01T08:00:00+00:00\", \"value\": \"Made public.\"}], \"datePublic\": \"2024-07-01T08:00:00.000Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2024:4312\", \"name\": \"RHSA-2024:4312\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4340\", \"name\": \"RHSA-2024:4340\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4389\", \"name\": \"RHSA-2024:4389\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4469\", \"name\": \"RHSA-2024:4469\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4474\", \"name\": \"RHSA-2024:4474\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4479\", \"name\": \"RHSA-2024:4479\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2024:4484\", \"name\": \"RHSA-2024:4484\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2024-6387\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2294604\", \"name\": \"RHBZ#2294604\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://santandersecurityresearch.github.io/blog/sshing_the_masses.html\"}, {\"url\": \"https://www.openssh.com/txt/release-9.8\"}, {\"url\": \"https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"The below process can protect against a Remote Code Execution attack by disabling the LoginGraceTime parameter on Red Hat Enterprise Linux 9. However, the sshd server is still vulnerable to a Denial of Service if an attacker exhausts all the connections.\\n\\n1) As root user, open the /etc/ssh/sshd_config\\n2) Add or edit the parameter configuration:\\n~~~\\nLoginGraceTime 0\\n~~~\\n3) Save and close the file\\n4) Restart the sshd daemon:\\n~~~\\nsystemctl restart sshd.service\\n~~~\\n\\nSetting LoginGraceTime to 0 disables the SSHD server\u0027s ability to drop connections if authentication is not completed within the specified timeout. If this mitigation is implemented, it is highly recommended to use a tool like \u0027fail2ban\u0027 alongside a firewall to monitor log files and manage connections appropriately.\\n\\nIf any of the mitigations mentioned above is used, please note that the removal of LoginGraceTime parameter from sshd_config is not automatic when the updated package is installed.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A security regression (CVE-2006-5051) was discovered in OpenSSH\u0027s server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-364\", \"description\": \"Signal Handler Race Condition\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2025-12-11T06:17:03.387Z\"}, \"x_redhatCweChain\": \"CWE-364: Signal Handler Race Condition\"}}",
"cveMetadata": "{\"cveId\": \"CVE-2024-6387\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-11T06:17:03.387Z\", \"dateReserved\": \"2024-06-27T13:41:03.421Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2024-07-01T12:37:25.431Z\", \"assignerShortName\": \"redhat\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…