Vulnerability Details : CVE-2011-4120
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.
Vulnerability category: Input validation
Products affected by CVE-2011-4120
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:yubico:pam_module:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2011-4120
1.48%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2011-4120
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2011-4120
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2011-4120
-
https://security-tracker.debian.org/tracker/CVE-2011-4120
CVE-2011-4120Third Party Advisory
-
https://access.redhat.com/security/cve/cve-2011-4120
Red Hat Customer Portal - Access to 24x7 support and knowledgeBroken Link;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120
733322 – (CVE-2011-4120) CVE-2011-4120 pam_yubico: Authentication bypass via NULL passwordIssue Tracking;Patch;Third Party Advisory
-
https://www.openwall.com/lists/oss-security/2011/11/07/6
oss-security - Re: CVE Request -- pam_yubico -- Authentication bypass via NULL passwordMailing List;Third Party Advisory
Jump to