USN-6665-1: Unbound vulnerabilities
28 February 2024
Several security issues were fixed in Unbound.
Releases
Packages
- unbound - validating, recursive, caching DNS resolver
Details
Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered
that Unbound incorrectly handled validating DNSSEC messages. A remote
attacker could possibly use this issue to cause Unbound to consume
resources, leading to a denial of service. (CVE-2023-50387)
It was discovered that Unbound incorrectly handled preparing an NSEC3
closest encloser proof. A remote attacker could possibly use this issue to
cause Unbound to consume resources, leading to a denial of service.
(CVE-2023-50868)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04
In general, a standard system update will make all the necessary changes.