Описание
Security update for bind
This update for bind fixes the following issues:
- CVE-2023-2828: Fixed denial-of-service against recursive resolvers related to cache-cleaning algorithm (bsc#1212544).
Список пакетов
Image SLES12-SP5-Azure-BYOS
Image SLES12-SP5-Azure-Basic-On-Demand
Image SLES12-SP5-Azure-HPC-BYOS
Image SLES12-SP5-Azure-HPC-On-Demand
Image SLES12-SP5-Azure-SAP-BYOS
Image SLES12-SP5-Azure-SAP-On-Demand
Image SLES12-SP5-Azure-Standard-On-Demand
Image SLES12-SP5-EC2-BYOS
Image SLES12-SP5-EC2-ECS-On-Demand
Image SLES12-SP5-EC2-On-Demand
Image SLES12-SP5-EC2-SAP-BYOS
Image SLES12-SP5-EC2-SAP-On-Demand
Image SLES12-SP5-GCE-BYOS
Image SLES12-SP5-GCE-On-Demand
Image SLES12-SP5-GCE-SAP-BYOS
Image SLES12-SP5-GCE-SAP-On-Demand
Image SLES12-SP5-SAP-Azure-LI-BYOS-Production
Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production
SUSE Linux Enterprise Server 12 SP4-ESPOS
SUSE Linux Enterprise Server 12 SP4-LTSS
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP4
SUSE Linux Enterprise Server for SAP Applications 12 SP5
SUSE Linux Enterprise Software Development Kit 12 SP5
SUSE OpenStack Cloud 9
SUSE OpenStack Cloud Crowbar 9
Ссылки
- Link for SUSE-SU-2023:2793-1
- E-Mail link for SUSE-SU-2023:2793-1
- SUSE Security Ratings
- SUSE Bug 1212544
- SUSE CVE CVE-2023-2828 page
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
Ссылки
- CVE-2023-2828
- SUSE Bug 1212544
- SUSE Bug 1216764