CVE-2023-2828 Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the…
Description
Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit. It has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
Affected products and versions
References
- CVE-2023-2828 kb.isc.org
- www.openwall.com www.openwall.com
- lists.fedoraproject.org lists.fedoraproject.org
- www.debian.org www.debian.org
- lists.fedoraproject.org lists.fedoraproject.org
- security.netapp.com security.netapp.com
- lists.debian.org lists.debian.org
Timeline
- Published
- Last modified