Recommended update for bind (important)

An update that solves four vulnerabilities, contains one
feature and has two fixes is now available.

Description:

This update for bind fixes the following issues:

Update to release 9.16.33:

• CVE-2022-2795: Fixed potential performance degredation due to missing
  database lookup limits when processing large delegations (bsc#1203614).

• CVE-2022-3080: Fixed assertion failure when there was a stale CNAME in
  the cache for the incoming query and the stale-answer-client-timeout
  option is set to 0 (bsc#1203618).

• CVE-2022-38177: Fixed a memory leak that could be externally triggered
  in the DNSSEC verification code for the ECDSA algorithm (bsc#1203619).

• CVE-2022-38178: Fixed memory leaks that could be externally triggered in
  the DNSSEC verification code for the EdDSA algorithm (bsc#1203620).

• Add systemd drop-in directory for named service (bsc#1201689).

• Add modified createNamedConfInclude script and README-bind.chrootenv
  (bsc#1203250).

• Feature Changes:

  • Response Rate Limiting (RRL) code now treats all QNAMEs that are
    subject to wildcard processing within a given zone as the same name,
    to prevent circumventing the limits enforced by RRL.

  • Zones using dnssec-policy now require dynamic DNS or inline-signing to
    be configured explicitly.

  • A backward-compatible approach was implemented for encoding
    internationalized domain names (IDN) in dig and converting the domain
    to IDNA2008 form; if that fails, BIND tries an IDNA2003 conversion.

  • The DNSSEC algorithms RSASHA1 and NSEC3RSASHA1 are now automatically
    disabled on systems where they are disallowed by the security policy.
    Primary zones using those algorithms need to be migrated to new
    algorithms prior to running on these systems, as graceful migration to
    different DNSSEC algorithms is not possible when RSASHA1 is disallowed
    by the operating system.

  • Log messages related to fetch limiting have been improved to provide
    more complete information. Specifically, the final counts of allowed
    and spilled fetches are now logged before the counter object is
    destroyed.

  • Non-dynamic zones that inherit dnssec-policy from the view or options
    blocks were not marked as inline-signed and therefore never scheduled
    to be re-signed. This has been fixed.

  • The old max-zone-ttl zone option was meant to be superseded by the
    max-zone-ttl option in dnssec-policy; however, the latter option was
    not fully effective. This has been corrected: zones no longer load if
    they contain TTLs greater than the limit configured in dnssec-policy.
    For zones with both the old max-zone-ttl option and dnssec-policy
    configured, the old option is ignored, and a warning is generated.

  • rndc dumpdb -expired was fixed to include expired RRsets, even if
    stale-cache-enable is set to no and the cache-cleaning time window has
    passed. (jsc#SLE-24600)

Patch Instructions:

To install this SUSE Security 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 15.4:

  zypper in -t patch openSUSE-SLE-15.4-2022-3767=1

• SUSE Linux Enterprise Module for Server Applications 15-SP4:

  zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP4-2022-3767=1

• SUSE Linux Enterprise Module for Basesystem 15-SP4:

  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP4-2022-3767=1