Security update for unbound

Announcement ID: SUSE-SU-2024:1991-2
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2022-30698 ( SUSE ): 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2022-30698 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • CVE-2022-30699 ( SUSE ): 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
  • CVE-2022-30699 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • CVE-2022-3204 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2022-3204 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2023-50387 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2023-50387 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2023-50868 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
  • SUSE Linux Enterprise Micro 5.5

An update that solves five vulnerabilities and contains one feature can now be installed.

Description:

This update for unbound fixes the following issues:

unbound was updated to 1.20.0:

  • A lot of bugfixes and added features. For a complete list take a look at the changelog located at: /usr/share/doc/packages/unbound/Changelog or https://www.nlnetlabs.nl/projects/unbound/download/

Some Noteworthy Changes:

  • Removed DLV. The DLV has been decommisioned since unbound 1.5.4 and has been advised to stop using it since. The use of dlv options displays a warning.
  • Remove EDNS lame procedure, do not re-query without EDNS after timeout.
  • Add DNS over HTTPS
  • libunbound has been upgraded to major version 8

Security Fixes: * CVE-2023-50387: DNSSEC verification complexity can be exploited to exhaust CPU resources and stall DNS resolvers. [bsc#1219823] * CVE-2023-50868: NSEC3 closest encloser proof can exhaust CPU. [bsc#1219826] * CVE-2022-30698: Novel "ghost domain names" attack by introducing subdomain delegations. [bsc#1202033] * CVE-2022-30699: Novel "ghost domain names" attack by updating almost expired delegation information. [bsc#1202031] * CVE-2022-3204: NRDelegation attack leads to uncontrolled resource consumption (Non-Responsive Delegation Attack). [bsc#1203643]

Packaging Changes:

  • Use prefixes instead of sudo in unbound.service
  • Remove no longer necessary BuildRequires: libfstrm-devel and libprotobuf-c-devel

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:

  • SUSE Linux Enterprise Micro 5.5
    zypper in -t patch SUSE-SLE-Micro-5.5-2024-1991=1

Package List:

  • SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
    • unbound-debugsource-1.20.0-150100.10.13.1
    • unbound-anchor-1.20.0-150100.10.13.1
    • libunbound8-1.20.0-150100.10.13.1
    • unbound-debuginfo-1.20.0-150100.10.13.1
    • libunbound8-debuginfo-1.20.0-150100.10.13.1

References: