Refine your search
3 vulnerabilities found for ntpsec by NTPsec
CVE-2026-18321 (GCVE-0-2026-18321)
Vulnerability from cvelistv5
Published
2026-07-31 18:04
Modified
2026-07-31 18:54
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Summary
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
References
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-18321",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-31T18:54:02.722476Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-31T18:54:10.546Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "ntpsec",
"vendor": "NTPsec",
"versions": [
{
"lessThan": "1.2.5",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Youngjoon Kim of Team Atlanta"
}
],
"descriptions": [
{
"lang": "en",
"value": "Buffer overflow in NTPsec\u0027s Zyfer refclock allows local attacker to crash ntpd"
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120: Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-31T18:04:06.697Z",
"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"shortName": "GitLab"
},
"references": [
{
"url": "https://gitlab.com/NTPsec/ntpsec/-/work_items/890"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to version 1.2.5"
}
],
"title": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027) in ntpsec"
}
},
"cveMetadata": {
"assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"assignerShortName": "GitLab",
"cveId": "CVE-2026-18321",
"datePublished": "2026-07-31T18:04:06.697Z",
"dateReserved": "2026-07-29T19:04:09.259Z",
"dateUpdated": "2026-07-31T18:54:10.546Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2023-4012 (GCVE-0-2023-4012)
Vulnerability from cvelistv5
Published
2023-08-07 17:30
Modified
2026-06-22 04:07
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-372 - Incomplete Internal State Distinction
Summary
ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T07:17:11.104Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "GitLab Issue #794",
"tags": [
"issue-tracking",
"x_transferred"
],
"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/794"
},
{
"tags": [
"x_transferred"
],
"url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-4012",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-08-30T15:47:43.075359Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-08-30T15:47:52.675Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "ntpsec",
"vendor": "NTPsec",
"versions": [
{
"status": "affected",
"version": "1.2.2"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "R.L. Nicholas"
}
],
"descriptions": [
{
"lang": "en",
"value": "ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3)."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-372",
"description": "CWE-372: Incomplete Internal State Distinction",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-22T04:07:22.152Z",
"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"shortName": "GitLab"
},
"references": [
{
"name": "GitLab Issue #794",
"tags": [
"issue-tracking"
],
"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/794"
},
{
"url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to version 1.2.2a or 1.2.3"
}
],
"title": "Incomplete Internal State Distinction in ntpsec"
}
},
"cveMetadata": {
"assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"assignerShortName": "GitLab",
"cveId": "CVE-2023-4012",
"datePublished": "2023-08-07T17:30:33.452Z",
"dateReserved": "2023-07-31T09:01:28.128Z",
"dateUpdated": "2026-06-22T04:07:22.152Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2021-22212 (GCVE-0-2021-22212)
Vulnerability from cvelistv5
Published
2021-06-08 12:07
Modified
2024-08-03 18:37
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- Improper filtering of special elements in ntpsec
Summary
ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with '#' characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the '#'. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them.
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T18:37:18.446Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/699"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json"
},
{
"name": "FEDORA-2021-3ffc890685",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "ntpsec",
"vendor": "NTPsec",
"versions": [
{
"status": "affected",
"version": "=1.2.0"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Maciej Zenczykowski"
}
],
"descriptions": [
{
"lang": "en",
"value": "ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with \u0027#\u0027 characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the \u0027#\u0027. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Improper filtering of special elements in ntpsec",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-06-26T02:06:11.000Z",
"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"shortName": "GitLab"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/699"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json"
},
{
"name": "FEDORA-2021-3ffc890685",
"tags": [
"vendor-advisory",
"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "cve@gitlab.com",
"ID": "CVE-2021-22212",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "ntpsec",
"version": {
"version_data": [
{
"version_value": "=1.2.0"
}
]
}
}
]
},
"vendor_name": "NTPsec"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Maciej Zenczykowski"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "ntpkeygen can generate keys that ntpd fails to parse. NTPsec 1.2.0 allows ntpkeygen to generate keys with \u0027#\u0027 characters. ntpd then either pads, shortens the key, or fails to load these keys entirely, depending on the key type and the placement of the \u0027#\u0027. This results in the administrator not being able to use the keys as expected or the keys are shorter than expected and easier to brute-force, possibly resulting in MITM attacks between ntp clients and ntp servers. For short AES128 keys, ntpd generates a warning that it is padding them."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Improper filtering of special elements in ntpsec"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://gitlab.com/NTPsec/ntpsec/-/issues/699",
"refsource": "MISC",
"url": "https://gitlab.com/NTPsec/ntpsec/-/issues/699"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859",
"refsource": "MISC",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1955859"
},
{
"name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json",
"refsource": "CONFIRM",
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22212.json"
},
{
"name": "FEDORA-2021-3ffc890685",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3GIT2HYL5BQXPGKI6ZDNG473IEQ5WQF2/"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"assignerShortName": "GitLab",
"cveId": "CVE-2021-22212",
"datePublished": "2021-06-08T12:07:02.000Z",
"dateReserved": "2021-01-05T00:00:00.000Z",
"dateUpdated": "2024-08-03T18:37:18.446Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}