USN-4938-1: Unbound vulnerabilities

6 May 2021

Several security issues were fixed in Unbound.

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Releases

Packages

  • unbound - validating, recursive, caching DNS resolver

Details

It was discovered that Unbound contained multiple security issues. A
remote attacker could possibly use these issues to cause a denial of
service, inject arbitrary commands, execute arbitrary code, and overwrite
local files.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.