CVE-2023-2829 (GCVE-0-2023-2829)
Vulnerability from cvelistv5 – Published: 2023-06-21 16:26 – Updated: 2025-02-13 16:48
VLAI
EPSS
VEX
Title
Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled
Summary
A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.
This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-06 18:34 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://kb.isc.org/docs/cve-2023-2829 | vendor-advisory |
| https://security.netapp.com/advisory/ntap-2023070… |
Impacted products
Date Public
2023-06-21 00:00
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"product_status:known_not_affected": "68",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "bind: DNSSEC-Validated cache can be remotely terminated with malformed NSEC record",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-2829.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-03T16:55:28Z",
"cve": "CVE-2023-2829",
"id": "CVE-2023-2829",
"initial_release_date": "2023-06-23T01:45:48Z",
"product_status:known_not_affected": "594",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-2829",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-2829.json",
"version": "15"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T06:33:05.969Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "CVE-2023-2829",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://kb.isc.org/docs/cve-2023-2829"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20230703-0010/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-2829",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-12-06T18:34:26.527193Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-12-06T18:34:33.207Z",
"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-S1",
"status": "affected",
"version": "9.16.8-S1",
"versionType": "custom"
},
{
"lessThanOrEqual": "9.18.15-S1",
"status": "affected",
"version": "9.18.11-S1",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "ISC would like to thank Greg Kuechle from SaskTel for bringing this vulnerability to our attention."
}
],
"datePublic": "2023-06-21T00:00:00Z",
"descriptions": [
{
"lang": "en",
"value": "A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1."
}
],
"exploits": [
{
"lang": "en",
"value": "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.\n\nNote that the BIND configuration option `synth-from-dnssec` is enabled by default in all versions of BIND 9.18 and 9.18-S and newer. In earlier versions of BIND that had this option available, it was disabled unless activated explicitly in `named.conf`."
}
]
}
],
"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": "2023-06-21T16:26:24.932Z",
"orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"shortName": "isc"
},
"references": [
{
"name": "CVE-2023-2829",
"tags": [
"vendor-advisory"
],
"url": "https://kb.isc.org/docs/cve-2023-2829"
},
{
"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-S1 or 9.18.16-S1."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled",
"workarounds": [
{
"lang": "en",
"value": "Setting `synth-from-dnssec` to `no` prevents the problem."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"assignerShortName": "isc",
"cveId": "CVE-2023-2829",
"datePublished": "2023-06-21T16:26:24.932Z",
"dateReserved": "2023-05-22T07:57:43.061Z",
"dateUpdated": "2024-12-06T18:34:46.254Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.