Risk | High |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2011-4120 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software |
Fedora Operating systems & Components / Operating system ykclient Operating systems & Components / Operating system package or component pam_yubico Operating systems & Components / Operating system package or component libyubikey Operating systems & Components / Operating system package or component |
Vendor | Fedoraproject |
Security Bulletin
This security bulletin contains one high risk vulnerability.
EUVDB-ID: #VU35033
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2011-4120
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
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.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 6
ykclient: before 2.7-1.el6
pam_yubico: before 2.10-1.el6
libyubikey: before 1.7-2.el6
CPE2.3https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2012-0417
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.