CVE-2020-16156

Publication date 13 December 2021

Last updated 24 July 2024

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

CPAN 2.28 allows Signature Verification Bypass.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
perl	23.04 lunar	Fixed 5.36.0-4ubuntu2
	22.10 kinetic	Fixed 5.34.0-5ubuntu1.1
	22.04 LTS jammy	Fixed 5.34.0-3ubuntu1.1
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.04 LTS focal	Fixed 5.30.0-9ubuntu0.3
	18.04 LTS bionic	Fixed 5.26.1-6ubuntu0.6
	16.04 LTS xenial	Fixed 5.22.1-9ubuntu0.9+esm1 Ubuntu Pro
	14.04 LTS trusty	Fixed 5.18.2-2ubuntu1.7+esm4 Ubuntu Pro

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Notes

rayveldkamp

Fix is in cpanpm 2.29

leosilva

using only ensured identified https mirrors could be a solution, as even perl modules if a trusted server is used its identity will be verified even in the absense of perl-module-signature.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
perl	Upstream: b27c51a Upstream: bcbf6d6 Upstream: 46fe910 Upstream: 7f9e5e8 Upstream: c03257d Upstream: 7d4d5e3 Upstream: 89b13ba

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H