PT-2020-16800 · Linux+1 · Linux-Pam+1

Guilherme De Almeida Suckevicz · Published 2020-11-25 · Updated 2024-06-15 · CVE-2020-27780

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux-Pam versions prior to 1.5.1

Description A flaw was found in the way Linux-Pam handles empty passwords for non-existing users. When the user does not exist, PAM attempts to authenticate with root, and in the case of an empty password, it successfully authenticates.

Recommendations For versions prior to 1.5.1, update to version 1.5.1 or later to resolve the issue. As a temporary workaround, consider restricting the authentication mechanism to prevent empty passwords from being used.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

ALT-PU-2020-3418

CVE-2020-27780

OPENSUSE-SU-2024:11140-1

Affected Products

Alt Linux

Linux-Pam

References · 9

• https://osv.dev/vulnerability/CVE-2020-27780 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11140-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2020-27780 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-27780 · Security Note
• https://suse.com/security/cve/CVE-2020-27780 · Note
• https://suse.com/security/cve/CVE-2018-17953 · Note
• https://t.me/cibsecurity/21042 · Telegram Post
• https://bugzilla.redhat.com/show_bug.cgi?id=1901094 · Note
• https://security.alpinelinux.org/vuln/CVE-2020-27780 · Note