Home/CVE/If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `st
CVE

CVE-2023-2911

If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `st

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.

HIGH · CVSS 7.5 EPSS 0.00177
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

11
isc bind>= 9.16.33 and <= 9.16.41
isc bind>= 9.18.7 and <= 9.18.15
isc bind>= 9.18.11 and <= 9.18.15
debian linuxall versions
fedoraproject fedoraall versions
netapp active iq unified managerall versions
netapp h700s firmwareall versions
netapp h300s firmwareall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-officer@isc.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Jun 2023 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

5
suse-csafopenSUSE-SU-2024:13015-1
suse-csafSUSE-SU-2023:2836-1
suse-csafSUSE-SU-2023:2667-1
msrcCVE-2023-2911
usnUSN-6183-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2023/06/21/6Mailing ListPatchThird Party Advisory
https://kb.isc.org/docs/cve-2023-2911Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20230703-0010/Third Party Advisory
https://www.debian.org/security/2023/dsa-5439Third Party Advisory
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