CVE-2023-2911
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.45% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- isc/bind · debian/debian linux · fedoraproject/fedora · netapp/active iq unified manager · netapp/h700s firmware · netapp/h300s firmware · netapp/h410c firmware · netapp/h410s firmware · netapp/h500s firmware
- Source
- security-officer@isc.org
References
- http://www.openwall.com/lists/oss-security/2023/06/21/6Mailing List, Patch, Third 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 List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230703-0010/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5439Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/06/21/6Mailing List, Patch, Third 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 List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230703-0010/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5439Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.