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CVE-2023-2911

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Date: June 21, 2023

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.

Language: C

Severity Score

Related Resources (9)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/
https://security.netapp.com/advisory/ntap-20230703-0010/
https://kb.isc.org/docs/cve-2023-2911
https://security-tracker.debian.org/tracker/CVE-2023-2911
https://nvd.nist.gov/vuln/detail/CVE-2023-2911
http://www.openwall.com/lists/oss-security/2023/06/21/6
https://www.debian.org/security/2023/dsa-5439
https://www.mend.io/vulnerability-database/CVE-2023-2911

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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