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SUSE-SU-2023:2789-1

Опубликовано: 06 июл. 2023
Источник: suse-cvrf

Описание

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).

Список пакетов

SUSE Linux Enterprise Server 12 SP2-BCL
bind-9.9.9P1-63.40.1
bind-chrootenv-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-utils-9.9.9P1-63.40.1

Ссылки

Описание

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.

Затронутые продукты
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
Ссылки