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CVE-2023-2911

HIGH
Published 2023-06-21T16:26:36.587Z
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CVSS Score

V3.1
7.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.405
Higher than 40.5% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Description

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

ISC

BIND 9

Affected Versions:

9.16.33 9.18.7 9.16.33-S1 9.18.11-S1

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-rrr5-v5h9-fpwp

Advisory Details

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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-2911
WEB https://kb.isc.org/docs/cve-2023-2911
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2
WEB https://security.netapp.com/advisory/ntap-20230703-0010
WEB https://www.debian.org/security/2023/dsa-5439
WEB http://www.openwall.com/lists/oss-security/2023/06/21/6

Advisory provided by GitHub Security Advisory Database. Published: June 21, 2023, Modified: April 4, 2024

References

https://kb.isc.org/docs/cve-2023-2911
http://www.openwall.com/lists/oss-security/2023/06/21/6
https://lists.fedoraproject.org/archives/list/[email protected]/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/
https://www.debian.org/security/2023/dsa-5439
https://lists.fedoraproject.org/archives/list/[email protected]/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/
https://security.netapp.com/advisory/ntap-20230703-0010/
Published: 2023-06-21T16:26:36.587Z
Last Modified: 2025-02-13T16:49:00.351Z
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