Security update for bind SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2023:2789-1 Final 1 1 2023-07-06T11:10:43Z current 2023-07-06T11:10:43Z 2023-07-06T11:10:43Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for bind This update for bind fixes the following issues: - CVE-2023-2828: Fixed DOS against recursive resolvers related to cache-cleaning algorithm (bsc#1212544). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2023-2789,SUSE-SLE-SERVER-12-SP2-BCL-2023-2789 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2023/suse-su-20232789-1/ Link for SUSE-SU-2023:2789-1 https://lists.suse.com/pipermail/sle-security-updates/2023-July/015457.html E-Mail link for SUSE-SU-2023:2789-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1212544 SUSE Bug 1212544 https://www.suse.com/security/cve/CVE-2023-2828/ SUSE CVE CVE-2023-2828 page SUSE Linux Enterprise Server 12 SP2-BCL bind-9.9.9P1-63.40.1 bind-chrootenv-9.9.9P1-63.40.1 bind-devel-9.9.9P1-63.40.1 bind-doc-9.9.9P1-63.40.1 bind-libs-9.9.9P1-63.40.1 bind-libs-32bit-9.9.9P1-63.40.1 bind-libs-64bit-9.9.9P1-63.40.1 bind-lwresd-9.9.9P1-63.40.1 bind-utils-9.9.9P1-63.40.1 bind-9.9.9P1-63.40.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL bind-chrootenv-9.9.9P1-63.40.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL bind-doc-9.9.9P1-63.40.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL bind-libs-9.9.9P1-63.40.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL bind-libs-32bit-9.9.9P1-63.40.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL bind-utils-9.9.9P1-63.40.1 as a component of SUSE Linux Enterprise Server 12 SP2-BCL 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-2023-2828 SUSE Linux Enterprise Server 12 SP2-BCL:bind-9.9.9P1-63.40.1 SUSE Linux Enterprise Server 12 SP2-BCL:bind-chrootenv-9.9.9P1-63.40.1 SUSE Linux Enterprise Server 12 SP2-BCL:bind-doc-9.9.9P1-63.40.1 SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-32bit-9.9.9P1-63.40.1 SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-9.9.9P1-63.40.1 SUSE Linux Enterprise Server 12 SP2-BCL:bind-utils-9.9.9P1-63.40.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2023/suse-su-20232789-1/ https://www.suse.com/security/cve/CVE-2023-2828.html CVE-2023-2828 https://bugzilla.suse.com/1212544 SUSE Bug 1212544