{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"Security update for bind","title":"Title of the patch"},{"category":"description","text":"This update for bind fixes the following issues:\n\n  - CVE-2023-2828: Fixed DOS against recursive resolvers related to cache-cleaning algorithm (bsc#1212544).\n\n","title":"Description of the patch"},{"category":"details","text":"SUSE-2023-2789,SUSE-SLE-SERVER-12-SP2-BCL-2023-2789","title":"Patchnames"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"SUSE ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"self","summary":"URL of this CSAF notice","url":"https://ftp.suse.com/pub/projects/security/csaf/suse-su-2023_2789-1.json"},{"category":"self","summary":"URL for SUSE-SU-2023:2789-1","url":"https://www.suse.com/support/update/announcement/2023/suse-su-20232789-1/"},{"category":"self","summary":"E-Mail link for SUSE-SU-2023:2789-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2023-July/015457.html"},{"category":"self","summary":"SUSE Bug 1212544","url":"https://bugzilla.suse.com/1212544"},{"category":"self","summary":"SUSE CVE CVE-2023-2828 page","url":"https://www.suse.com/security/cve/CVE-2023-2828/"}],"title":"Security update for 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SP2-BCL:bind-chrootenv-9.9.9P1-63.40.1.x86_64"},"product_reference":"bind-chrootenv-9.9.9P1-63.40.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Server 12 SP2-BCL"},{"category":"default_component_of","full_product_name":{"name":"bind-doc-9.9.9P1-63.40.1.noarch as component of SUSE Linux Enterprise Server 12 SP2-BCL","product_id":"SUSE Linux Enterprise Server 12 SP2-BCL:bind-doc-9.9.9P1-63.40.1.noarch"},"product_reference":"bind-doc-9.9.9P1-63.40.1.noarch","relates_to_product_reference":"SUSE Linux Enterprise Server 12 SP2-BCL"},{"category":"default_component_of","full_product_name":{"name":"bind-libs-9.9.9P1-63.40.1.x86_64 as component of SUSE Linux Enterprise Server 12 SP2-BCL","product_id":"SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-9.9.9P1-63.40.1.x86_64"},"product_reference":"bind-libs-9.9.9P1-63.40.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Server 12 SP2-BCL"},{"category":"default_component_of","full_product_name":{"name":"bind-libs-32bit-9.9.9P1-63.40.1.x86_64 as component of SUSE Linux Enterprise Server 12 SP2-BCL","product_id":"SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-32bit-9.9.9P1-63.40.1.x86_64"},"product_reference":"bind-libs-32bit-9.9.9P1-63.40.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Server 12 SP2-BCL"},{"category":"default_component_of","full_product_name":{"name":"bind-utils-9.9.9P1-63.40.1.x86_64 as component of SUSE Linux Enterprise Server 12 SP2-BCL","product_id":"SUSE Linux Enterprise Server 12 SP2-BCL:bind-utils-9.9.9P1-63.40.1.x86_64"},"product_reference":"bind-utils-9.9.9P1-63.40.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Server 12 SP2-BCL"}]},"vulnerabilities":[{"cve":"CVE-2023-2828","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2023-2828"}],"notes":[{"category":"general","text":"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.\n\nIt 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.\nThis 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.","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Enterprise Server 12 SP2-BCL:bind-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-chrootenv-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-doc-9.9.9P1-63.40.1.noarch","SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-32bit-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-utils-9.9.9P1-63.40.1.x86_64"]},"references":[{"category":"external","summary":"CVE-2023-2828","url":"https://www.suse.com/security/cve/CVE-2023-2828"},{"category":"external","summary":"SUSE Bug 1212544 for CVE-2023-2828","url":"https://bugzilla.suse.com/1212544"},{"category":"external","summary":"SUSE Bug 1216764 for CVE-2023-2828","url":"https://bugzilla.suse.com/1216764"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["SUSE Linux Enterprise Server 12 SP2-BCL:bind-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-chrootenv-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-doc-9.9.9P1-63.40.1.noarch","SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-32bit-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-utils-9.9.9P1-63.40.1.x86_64"]}],"scores":[{"cvss_v3":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"products":["SUSE Linux Enterprise Server 12 SP2-BCL:bind-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-chrootenv-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-doc-9.9.9P1-63.40.1.noarch","SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-32bit-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-libs-9.9.9P1-63.40.1.x86_64","SUSE Linux Enterprise Server 12 SP2-BCL:bind-utils-9.9.9P1-63.40.1.x86_64"]}],"threats":[{"category":"impact","date":"2023-07-06T11:10:43Z","details":"important"}],"title":"CVE-2023-2828"}]}