# Security update for bind

Announcement ID: SUSE-SU-2024:2862-1  
Rating: important  
References:

  * bsc#1228256
  * bsc#1228257
  * bsc#1228258

  
Cross-References:

  * CVE-2024-1737
  * CVE-2024-1975
  * CVE-2024-4076

  
CVSS scores:

  * CVE-2024-1737 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2024-1975 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2024-4076 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * Basesystem Module 15-SP5
  * openSUSE Leap 15.5
  * Server Applications Module 15-SP5
  * SUSE Linux Enterprise Desktop 15 SP5
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise Micro 5.5
  * SUSE Linux Enterprise Real Time 15 SP5
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for bind fixes the following issues:

Update to 9.16.50:

  * Bug Fixes:
  * A regression in cache-cleaning code enabled memory use to grow significantly
    more quickly than before, until the configured max-cache-size limit was
    reached. This has been fixed.
  * Using rndc flush inadvertently caused cache cleaning to become less
    effective. This could ultimately lead to the configured max-cache-size limit
    being exceeded and has now been fixed.
  * The logic for cleaning up expired cached DNS records was tweaked to be more
    aggressive. This change helps with enforcing max-cache-ttl and max-ncache-
    ttl in a timely manner.
  * It was possible to trigger a use-after-free assertion when the overmem cache
    cleaning was initiated. This has been fixed. New Features:
  * Added RESOLVER.ARPA to the built in empty zones.
  * Security Fixes:
  * It is possible to craft excessively large numbers of resource record types
    for a given owner name, which has the effect of slowing down database
    processing. This has been addressed by adding a configurable limit to the
    number of records that can be stored per name and type in a cache or zone
    database. The default is 100, which can be tuned with the new max-types-per-
    name option. (CVE-2024-1737, bsc#1228256)
  * Validating DNS messages signed using the SIG(0) protocol (RFC 2931) could
    cause excessive CPU load, leading to a denial-of-service condition. Support
    for SIG(0) message validation was removed from this version of named.
    (CVE-2024-1975, bsc#1228257)
  * When looking up the NS records of parent zones as part of looking up DS
    records, it was possible for named to trigger an assertion failure if serve-
    stale was enabled. This has been fixed. (CVE-2024-4076, bsc#1228258)

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * openSUSE Leap 15.5  
    zypper in -t patch SUSE-2024-2862=1 openSUSE-SLE-15.5-2024-2862=1

  * SUSE Linux Enterprise Micro 5.5  
    zypper in -t patch SUSE-SLE-Micro-5.5-2024-2862=1

  * Basesystem Module 15-SP5  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP5-2024-2862=1

  * Server Applications Module 15-SP5  
    zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP5-2024-2862=1

## Package List:

  * openSUSE Leap 15.5 (aarch64 ppc64le s390x x86_64 i586)
    * bind-debuginfo-9.16.50-150500.8.21.1
    * bind-debugsource-9.16.50-150500.8.21.1
    * bind-utils-9.16.50-150500.8.21.1
    * bind-9.16.50-150500.8.21.1
    * bind-utils-debuginfo-9.16.50-150500.8.21.1
  * openSUSE Leap 15.5 (noarch)
    * bind-doc-9.16.50-150500.8.21.1
    * python3-bind-9.16.50-150500.8.21.1
  * SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
    * bind-utils-9.16.50-150500.8.21.1
    * bind-utils-debuginfo-9.16.50-150500.8.21.1
  * SUSE Linux Enterprise Micro 5.5 (noarch)
    * python3-bind-9.16.50-150500.8.21.1
  * SUSE Linux Enterprise Micro 5.5 (x86_64)
    * bind-debugsource-9.16.50-150500.8.21.1
    * bind-debuginfo-9.16.50-150500.8.21.1
  * Basesystem Module 15-SP5 (aarch64 ppc64le s390x x86_64)
    * bind-debugsource-9.16.50-150500.8.21.1
    * bind-utils-9.16.50-150500.8.21.1
    * bind-utils-debuginfo-9.16.50-150500.8.21.1
    * bind-debuginfo-9.16.50-150500.8.21.1
  * Basesystem Module 15-SP5 (noarch)
    * python3-bind-9.16.50-150500.8.21.1
  * Server Applications Module 15-SP5 (aarch64 ppc64le s390x x86_64)
    * bind-debugsource-9.16.50-150500.8.21.1
    * bind-9.16.50-150500.8.21.1
    * bind-debuginfo-9.16.50-150500.8.21.1
  * Server Applications Module 15-SP5 (noarch)
    * bind-doc-9.16.50-150500.8.21.1

## References:

  * https://www.suse.com/security/cve/CVE-2024-1737.html
  * https://www.suse.com/security/cve/CVE-2024-1975.html
  * https://www.suse.com/security/cve/CVE-2024-4076.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1228256
  * https://bugzilla.suse.com/show_bug.cgi?id=1228257
  * https://bugzilla.suse.com/show_bug.cgi?id=1228258