# Security update for unbound

Announcement ID: SUSE-SU-2024:1991-2  
Rating: important  
References:

  * bsc#1202031
  * bsc#1202033
  * bsc#1203643
  * bsc#1219823
  * bsc#1219826
  * jsc#PED-8333

  
Cross-References:

  * CVE-2022-30698
  * CVE-2022-30699
  * CVE-2022-3204
  * CVE-2023-50387
  * CVE-2023-50868

  
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:

  * https://www.suse.com/security/cve/CVE-2022-30698.html
  * https://www.suse.com/security/cve/CVE-2022-30699.html
  * https://www.suse.com/security/cve/CVE-2022-3204.html
  * https://www.suse.com/security/cve/CVE-2023-50387.html
  * https://www.suse.com/security/cve/CVE-2023-50868.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1202031
  * https://bugzilla.suse.com/show_bug.cgi?id=1202033
  * https://bugzilla.suse.com/show_bug.cgi?id=1203643
  * https://bugzilla.suse.com/show_bug.cgi?id=1219823
  * https://bugzilla.suse.com/show_bug.cgi?id=1219826
  * https://jira.suse.com/browse/PED-8333