Critical severity · published Nov 26, 2019
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…
9.8
CVSS
2%
EPSS
No
On KEV
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
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 81% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0; 10.0 · source: NVD
PM
Pam Module · Yubico
before 2.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-4120
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-4120
Broken Link
https://access.redhat.com/security/cve/cve-2011-4120
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4120
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-4120
Mailing List
https://www.openwall.com/lists/oss-security/2011/11/07/6
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