vulnerability

Rocky Linux: CVE-2023-2828: bind (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Jun 21, 2023
Added
Mar 5, 2024
Modified
Aug 13, 2025

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.

Solutions

rocky-upgrade-bindrocky-upgrade-bind-chrootrocky-upgrade-bind-debuginforocky-upgrade-bind-debugsourcerocky-upgrade-bind-develrocky-upgrade-bind-dnssec-utilsrocky-upgrade-bind-dnssec-utils-debuginforocky-upgrade-bind-export-develrocky-upgrade-bind-export-libsrocky-upgrade-bind-export-libs-debuginforocky-upgrade-bind-libsrocky-upgrade-bind-libs-debuginforocky-upgrade-bind-libs-literocky-upgrade-bind-libs-lite-debuginforocky-upgrade-bind-lite-develrocky-upgrade-bind-pkcs11rocky-upgrade-bind-pkcs11-debuginforocky-upgrade-bind-pkcs11-develrocky-upgrade-bind-pkcs11-libsrocky-upgrade-bind-pkcs11-libs-debuginforocky-upgrade-bind-pkcs11-utilsrocky-upgrade-bind-pkcs11-utils-debuginforocky-upgrade-bind-sdbrocky-upgrade-bind-sdb-chrootrocky-upgrade-bind-sdb-debuginforocky-upgrade-bind-utilsrocky-upgrade-bind-utils-debuginforocky-upgrade-bind9.16rocky-upgrade-bind9.16-chrootrocky-upgrade-bind9.16-debuginforocky-upgrade-bind9.16-debugsourcerocky-upgrade-bind9.16-develrocky-upgrade-bind9.16-dnssec-utilsrocky-upgrade-bind9.16-dnssec-utils-debuginforocky-upgrade-bind9.16-libsrocky-upgrade-bind9.16-libs-debuginforocky-upgrade-bind9.16-utilsrocky-upgrade-bind9.16-utils-debuginfo
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