CVE-2023-2911 (GCVE-0-2023-2911)
Vulnerability from cvelistv5
Published
2023-06-21 16:26
Modified
2025-02-13 16:49
Severity ?
VLAI Severity ?
EPSS score ?
Summary
If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow.
This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
References
Impacted products
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T06:41:03.760Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "CVE-2023-2911",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://kb.isc.org/docs/cve-2023-2911"
},
{
"tags": [
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2023/06/21/6"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.debian.org/security/2023/dsa-5439"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20230703-0010/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-2911",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-12-06T18:32:18.833805Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-12-06T18:32:26.092Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "BIND 9",
"vendor": "ISC",
"versions": [
{
"lessThanOrEqual": "9.16.41",
"status": "affected",
"version": "9.16.33",
"versionType": "custom"
},
{
"lessThanOrEqual": "9.18.15",
"status": "affected",
"version": "9.18.7",
"versionType": "custom"
},
{
"lessThanOrEqual": "9.16.41-S1",
"status": "affected",
"version": "9.16.33-S1",
"versionType": "custom"
},
{
"lessThanOrEqual": "9.18.15-S1",
"status": "affected",
"version": "9.18.11-S1",
"versionType": "custom"
}
]
}
],
"datePublic": "2023-06-21T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow.\nThis issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1."
}
],
"exploits": [
{
"lang": "en",
"value": "This flaw was discovered in internal testing. We are not aware of any active exploits."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "By sending specific queries to the resolver, an attacker can cause `named` to terminate unexpectedly."
}
]
}
],
"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"
}
}
],
"providerMetadata": {
"dateUpdated": "2023-07-03T15:06:21.382Z",
"orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"shortName": "isc"
},
"references": [
{
"name": "CVE-2023-2911",
"tags": [
"vendor-advisory"
],
"url": "https://kb.isc.org/docs/cve-2023-2911"
},
{
"url": "http://www.openwall.com/lists/oss-security/2023/06/21/6"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/"
},
{
"url": "https://www.debian.org/security/2023/dsa-5439"
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/"
},
{
"url": "https://security.netapp.com/advisory/ntap-20230703-0010/"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.42, 9.18.16, 9.16.42-S1, or 9.18.16-S1."
}
],
"source": {
"discovery": "INTERNAL"
},
"title": "Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0",
"workarounds": [
{
"lang": "en",
"value": "Setting `stale-answer-client-timeout` to `off` or to a non-zero value prevents the issue.\n\nUsers of versions 9.18.10, 9.16.36, 9.16.36-S1 or older who are unable to upgrade should set `stale-answer-client-timeout` to `off`; using a non-zero value with these older versions leaves `named` vulnerable to CVE-2022-3924.\n\nAlthough it is possible to set the `recursive-clients` limit to a high number to reduce the likelihood of this scenario, this is not recommended; the limit on `recursive-clients` is important for preventing exhaustion of server resources. The limit cannot be disabled entirely."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"assignerShortName": "isc",
"cveId": "CVE-2023-2911",
"datePublished": "2023-06-21T16:26:36.587Z",
"dateReserved": "2023-05-26T11:20:45.872Z",
"dateUpdated": "2025-02-13T16:49:00.351Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://kb.isc.org/docs/cve-2023-2911\", \"name\": \"CVE-2023-2911\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/06/21/6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.debian.org/security/2023/dsa-5439\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20230703-0010/\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T06:41:03.760Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-2911\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-06T18:32:18.833805Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-06T18:32:22.652Z\"}}], \"cna\": {\"title\": \"Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0\", \"source\": {\"discovery\": \"INTERNAL\"}, \"impacts\": [{\"descriptions\": [{\"lang\": \"en\", \"value\": \"By sending specific queries to the resolver, an attacker can cause `named` to terminate unexpectedly.\"}]}], \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"ISC\", \"product\": \"BIND 9\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.16.33\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"9.16.41\"}, {\"status\": \"affected\", \"version\": \"9.18.7\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"9.18.15\"}, {\"status\": \"affected\", \"version\": \"9.16.33-S1\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"9.16.41-S1\"}, {\"status\": \"affected\", \"version\": \"9.18.11-S1\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"9.18.15-S1\"}], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"This flaw was discovered in internal testing. We are not aware of any active exploits.\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.42, 9.18.16, 9.16.42-S1, or 9.18.16-S1.\"}], \"datePublic\": \"2023-06-21T00:00:00.000Z\", \"references\": [{\"url\": \"https://kb.isc.org/docs/cve-2023-2911\", \"name\": \"CVE-2023-2911\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/06/21/6\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/\"}, {\"url\": \"https://www.debian.org/security/2023/dsa-5439\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20230703-0010/\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Setting `stale-answer-client-timeout` to `off` or to a non-zero value prevents the issue.\\n\\nUsers of versions 9.18.10, 9.16.36, 9.16.36-S1 or older who are unable to upgrade should set `stale-answer-client-timeout` to `off`; using a non-zero value with these older versions leaves `named` vulnerable to CVE-2022-3924.\\n\\nAlthough it is possible to set the `recursive-clients` limit to a high number to reduce the likelihood of this scenario, this is not recommended; the limit on `recursive-clients` is important for preventing exhaustion of server resources. The limit cannot be disabled entirely.\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow.\\nThis issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.\"}], \"providerMetadata\": {\"orgId\": \"404fd4d2-a609-4245-b543-2c944a302a22\", \"shortName\": \"isc\", \"dateUpdated\": \"2023-07-03T15:06:21.382Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-2911\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-02-13T16:49:00.351Z\", \"dateReserved\": \"2023-05-26T11:20:45.872Z\", \"assignerOrgId\": \"404fd4d2-a609-4245-b543-2c944a302a22\", \"datePublished\": \"2023-06-21T16:26:36.587Z\", \"assignerShortName\": \"isc\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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…