#VU48796 Improper Authentication in linux-pam - CVE-2020-27780
Published: December 7, 2020
Vulnerability identifier: #VU48796
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-27780
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
linux-pam
linux-pam
Software vendor:
git.kernel.org
git.kernel.org
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when processing authentication requests in Linux PAM module. A remote or local attacker can bypass authentication process and gain unauthorized access to the application.
Successful exploitation of the vulnerability requires that the account used for authentication does not exists on the system and the password for root account is empty (but root locked down).
Remediation
Install updates from vendor's website.