[Debian] High CVE: CVE-2023-2828/CVE-2023-2911: bind: multiple CVEs

[Yue Tao]

CVE-2023-2828: https://nvd.nist.gov/vuln/detail/CVE-2023-2828

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.

CVE-2023-2911: https://nvd.nist.gov/vuln/detail/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 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.

Base Score: High

https://www.debian.org/security/2023/dsa-5439

['bind9-dnsutils_1:9.16.37-1~deb11u1_amd64.deb===>bind9-dnsutils_1:9.16.42-1~deb11u1_amd64.deb', 'bind9-host_1:9.16.37-1~deb11u1_amd64.deb===>bind9-host_1:9.16.42-1~deb11u1_amd64.deb', 'bind9-libs_1:9.16.37-1~deb11u1_amd64.deb===>bind9-libs_1:9.16.42-1~deb11u1_amd64.deb']

[Ghada Khalil (gkhalil)]

Fixed by https://review.opendev.org/c/starlingx/tools/+/888018 which merged on July 11.