Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Yubico | Pam Module | < 2.10 |
| Linux | Linux Kernel | - |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/cve-2011-4120Broken LinkThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120Issue TrackingPatchThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2011-4120Third Party Advisory
- https://www.openwall.com/lists/oss-security/2011/11/07/6Mailing ListThird Party Advisory
- https://access.redhat.com/security/cve/cve-2011-4120Broken LinkThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120Issue TrackingPatchThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2011-4120Third Party Advisory
- https://www.openwall.com/lists/oss-security/2011/11/07/6Mailing ListThird Party Advisory
FAQ
What is CVE-2011-4120?
CVE-2011-4120 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2011-4120?
CVE-2011-4120 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2011-4120?
Check the references section above for vendor advisories and patch information. Affected products include: Yubico Pam Module, Linux Linux Kernel, Debian Debian Linux.