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Ubuntu Security Notice USN-6112-2
June 05, 2023

perl vulnerability

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

• Ubuntu 23.04
• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Summary:

Perl could be made to install modules from untrusted sources.

Software Description:

• perl: Practical Extraction and Report Language

Details:

USN-6112-1 fixed vulnerabilities in Perl. This update provides the
corresponding updates for Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu
22.10, and Ubuntu 23.04.

Original advisory details:

It was discovered that Perl was not properly verifying TLS certificates
when using CPAN together with HTTP::Tiny to download modules over HTTPS.
If a remote attacker were able to intercept communications, this flaw
could potentially be used to install altered modules.

Update instructions:

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

Ubuntu 23.04:
perl 5.36.0-7ubuntu0.23.04.1

Ubuntu 22.10:
perl 5.34.0-5ubuntu1.2

Ubuntu 22.04 LTS:
perl 5.34.0-3ubuntu1.2

Ubuntu 20.04 LTS:
perl 5.30.0-9ubuntu0.4

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

References:
https://ubuntu.com/security/notices/USN-6112-2
https://ubuntu.com/security/notices/USN-6112-1
CVE-2023-31484

Package Information:
https://launchpad.net/ubuntu/+source/perl/5.36.0-7ubuntu0.23.04.1
https://launchpad.net/ubuntu/+source/perl/5.34.0-5ubuntu1.2
https://launchpad.net/ubuntu/+source/perl/5.34.0-3ubuntu1.2
https://launchpad.net/ubuntu/+source/perl/5.30.0-9ubuntu0.4