Vulnerability Monitor

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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.

Published

2019-11-26T05:15:13.130

Last Modified

2024-11-21T01:31:53.250

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	yubico	pam_module	< 2.10	Yes
Operating System	linux	linux_kernel	-	No
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes

References

https://access.redhat.com/security/cve/cve-2011-4120 Broken Link, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://security-tracker.debian.org/tracker/CVE-2011-4120 Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2011/11/07/6 Mailing List, Third Party Advisory ([email protected])
https://access.redhat.com/security/cve/cve-2011-4120 Broken Link, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security-tracker.debian.org/tracker/CVE-2011-4120 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2011/11/07/6 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)