USN-4374-1: Unbound vulnerabilities
unbound vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS
Summary
Several security issues were fixed in Unbound.
Software Description
- unbound – validating, recursive, caching DNS resolver
Details
Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Unbound
incorrectly handled certain queries. A remote attacker could use this issue
to perform an amplification attack directed at a target. (CVE-2020-12662)
It was discovered that Unbound incorrectly handled certain malformed
answers. A remote attacker could possibly use this issue to cause Unbound
to crash, resulting in a denial of service. (CVE-2020-12663)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 20.04 LTS
- libunbound8 – 1.9.4-2ubuntu1.1
- unbound – 1.9.4-2ubuntu1.1
- Ubuntu 19.10
- libunbound8 – 1.9.0-2ubuntu1.1
- unbound – 1.9.0-2ubuntu1.1
- Ubuntu 18.04 LTS
- libunbound2 – 1.6.7-1ubuntu2.3
- unbound – 1.6.7-1ubuntu2.3
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: USN-4374-1: Unbound vulnerabilities
