USN-6998-1: Unbound vulnerabilities

USN-6998-1: Unbound vulnerabilities
11 September 2024

Several security issues were fixed in Unbound.

Releases
Ubuntu 24.04 LTS Ubuntu 22.04 LTS Ubuntu 20.04 LTS Ubuntu 18.04 ESM Ubuntu 16.04 ESM Ubuntu 14.04 ESM

Packages
unbound - validating, recursive, caching DNS resolver

Details
It was discovered that Unbound incorrectly handled string comparisons,
which could lead to a NULL pointer dereference. An attacker could
potentially use this issue to cause a denial of service. (CVE-2024-43167)

It was discovered that Unbound incorrectly handled memory in
cfg_mark_ports, which could lead to a heap buffer overflow. A local
attacker could potentially use this issue to cause a denial of service
or execute arbitrary code. (CVE-2024-43168)

Update instructions
The problem can be corrected by updating your system to the following package versions:

Ubuntu 24.04
libunbound8 - 1.19.2-1ubuntu3.2
unbound - 1.19.2-1ubuntu3.2
unbound-host - 1.19.2-1ubuntu3.2