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Ubuntu Security Notice USN-5689-1
October 19, 2022

perl vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Perl could be made to by pass signature verification.

Software Description:
- perl: Practical Extraction and Report Language

Details:

It was discovered that Perl incorrectly handled certain signature verification.
An remote attacker could possibly use this issue to bypass signature verification.

Update instructions:

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

Ubuntu 22.04 LTS:
  perl                            5.34.0-3ubuntu1.1

Ubuntu 20.04 LTS:
  perl                            5.30.0-9ubuntu0.3

Ubuntu 18.04 LTS:
  perl                            5.26.1-6ubuntu0.6

Ubuntu 16.04 ESM:
  perl                            5.22.1-9ubuntu0.9+esm1

Ubuntu 14.04 ESM:
  perl                            5.18.2-2ubuntu1.7+esm4

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

References:
  https://ubuntu.com/security/notices/USN-5689-1
  CVE-2020-16156

Package Information:
  https://launchpad.net/ubuntu/+source/perl/5.34.0-3ubuntu1.1
  https://launchpad.net/ubuntu/+source/perl/5.30.0-9ubuntu0.3
  https://launchpad.net/ubuntu/+source/perl/5.26.1-6ubuntu0.6