Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isc | Bind | >= 9.16.33, <= 9.16.41 |
| Debian | Debian Linux | 11.0 |
| Fedoraproject | Fedora | 37 |
| Netapp | Active Iq Unified Manager | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
Related Weaknesses (CWE)
References
- 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/[email protected]Mailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]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
- 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/[email protected]Mailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]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
FAQ
What is CVE-2023-2911?
CVE-2023-2911 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 c...
How severe is CVE-2023-2911?
CVE-2023-2911 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-2911?
Check the references section above for vendor advisories and patch information. Affected products include: Isc Bind, Debian Debian Linux, Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp H700S Firmware.