CVE-2011-4120: Input Validation
First published: Tue Nov 26 2019(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Yubico PAM Module | <2.10 | |
| Linux Linux kernel | ||
| debian/yubico-pam | 2.26-1.1 2.27-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2011-4120?
CVE-2011-4120 is a vulnerability in the Yubico PAM Module before version 2.10 that allows a remote attacker to bypass authentication.
How does CVE-2011-4120 affect Debian Linux 8.0?
Debian Linux 8.0 is affected by CVE-2011-4120 if the Yubico PAM module version is older than 2.10.
How does CVE-2011-4120 affect Debian Linux 9.0?
Debian Linux 9.0 is affected by CVE-2011-4120 if the Yubico PAM module version is older than 2.10.
How does CVE-2011-4120 affect Debian Linux 10.0?
Debian Linux 10.0 is affected by CVE-2011-4120 if the Yubico PAM module version is older than 2.10.
How can I fix CVE-2011-4120?
To fix CVE-2011-4120, update the Yubico PAM module to version 2.10 or later.
- collector/nvd-historical
- collector/nvd-index
- agent/references
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/author
- agent/remedy
- agent/weakness
- agent/last-modified-date
- agent/description
- agent/first-publish-date
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/tags
- agent/softwarecombine
- agent/event
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/yubico
- canonical/yubico pam module
- vendor/linux
- canonical/linux linux kernel
- package-manager/debian