1. Ubuntu Security Notices
  2. USN-4938-1

USN-4938-1: Unbound vulnerabilities

Publication date

6 May 2021

Overview

Several security issues were fixed in Unbound.

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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.04 focal libunbound8 –  1.9.4-2ubuntu1.2
unbound –  1.9.4-2ubuntu1.2
18.04 bionic libunbound2 –  1.6.7-1ubuntu2.4
unbound –  1.6.7-1ubuntu2.4

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References

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