VULNERABILITY INTELLIGENCE

CVE-2011-4120

CVSS score9.8 CRITICAL
EPSS probability2.02%
CISA KEVNot currently listed
Published2019-11-26
Last modified2026-06-16
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Yubico PAM Module before 2.10 performed user authentication when 'use_first_pass' PAM configuration option was not used and the module was configured as 'sufficient' in the PAM configuration. A remote attacker could use this flaw to circumvent common authentication process and obtain access to the account in question by providing a NULL value (pressing Ctrl-D keyboard sequence) as the password string.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references