CVE-2023-6516 Affecting bind9 package, versions <1:9.17.19-1
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Test your applications- Snyk ID SNYK-DEBIAN12-BIND9-6245308
- published 14 Feb 2024
- disclosed 13 Feb 2024
Introduced: 13 Feb 2024
CVE-2023-6516 Open this link in a new tabHow to fix?
Upgrade Debian:12 bind9 to version 1:9.17.19-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bind9 package and not the bind9 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2023-6516
- https://kb.isc.org/docs/cve-2023-6516
- http://www.openwall.com/lists/oss-security/2024/02/13/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
- https://security.netapp.com/advisory/ntap-20240503-0008/