vulnerability

Gentoo Linux: CVE-2020-27780: Linux-PAM: Authentication bypass

Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
Dec 7, 2020
Added
Dec 7, 2020
Modified
Mar 31, 2026

Description

A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.

Solution

gentoo-linux-upgrade-sys-libs-pam
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.