CVE-2011-4120
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.02% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- yubico/pam module · debian/debian linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/security/cve/cve-2011-4120Broken Link, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120Issue Tracking, Patch, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2011-4120Third Party Advisory
- https://www.openwall.com/lists/oss-security/2011/11/07/6Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/cve-2011-4120Broken Link, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120Issue Tracking, Patch, Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2011-4120Third Party Advisory
- https://www.openwall.com/lists/oss-security/2011/11/07/6Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.