Ubuntu update for perl

1) Improper Certificate Validation

EUVDB-ID: #VU75604

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-31484

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to missing verification of the TLS certificate when downloading distributions. A remote attacker can perform MitM attack and trick the application into downloading a malicious file.

Mitigation

Update the affected package perl to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 23.04

perl (Ubuntu package): before 5.30.0-9ubuntu0.4

CPE2.3

• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:perl_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6112-2

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.