Vulnerability Description
To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isc | Bind | >= 9.16.0, <= 9.16.45 |
| Netapp | Active Iq Unified Manager | - |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2024/02/13/1Mailing ListThird Party Advisory
- https://kb.isc.org/docs/cve-2023-6516Vendor 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-20240503-0008/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/02/13/1Mailing ListThird Party Advisory
- https://kb.isc.org/docs/cve-2023-6516Vendor 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-20240503-0008/Third Party Advisory
FAQ
What is CVE-2023-6516?
CVE-2023-6516 is a vulnerability with a CVSS score of 7.5 (HIGH). To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chu...
How severe is CVE-2023-6516?
CVE-2023-6516 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-2023-6516?
Check the references section above for vendor advisories and patch information. Affected products include: Isc Bind, Netapp Active Iq Unified Manager.