CVE-2011-4120 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://access.redhat.com/security/cve/cve-2011-4120 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120 https://security-tracker.debian.org/tracker/CVE-2011-4120 https://www.openwall.com/lists/oss-security/2011/11/07/6

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8