CVE-2011-4966
freeradius: does not respect expired passwords when using the unix module
Severity Score
8.8
*CVSS v3
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
modules/rlm_unix/rlm_unix.c in FreeRADIUS before 2.2.0, when unix mode is enabled for user authentication, does not properly check the password expiration in /etc/shadow, which allows remote authenticated users to authenticate using an expired password.
modules/rlm_unix/rlm_unix.c en FreeRADIUS anterior a v2.2.0, cuando el modo unix está activado para la autenticación de usuarios, no valida adecuadamente la expiración de la contraseña en /etc/shadow, lo que permite a usuarios autenticados remotamente validarse mediante una contraseña caducada.
It was found that the unix module ignored the password expiration setting in /etc/shadow. If FreeRADIUS was configured to use this module for user authentication, this flaw could allow users with an expired password to successfully authenticate, even though their access should have been denied. Stack-based buffer overflow in the cbtls_verify function in FreeRADIUS 2.1.10 through 2.1.12, when using TLS-based EAP methods, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long not after timestamp in a client certificate.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2011-12-23 CVE Reserved
- 2013-01-08 CVE Published
- 2024-08-07 CVE Updated
- 2025-07-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-255: Credentials Management Errors
CAPEC
References (7)
| URL | Tag | Source |
|---|---|---|
| http://rhn.redhat.com/errata/RHBA-2012-0881.html | X_refsource_misc | |
| https://github.com/alandekok/freeradius-server/commit/1b1ec5ce75e224bd1755650c18ccdaa6dc53e605 | X_refsource_confirm |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://rhn.redhat.com/errata/RHSA-2013-0134.html | 2013-03-19 |
| URL | Date | SRC |
|---|---|---|
| http://lists.opensuse.org/opensuse-updates/2013-01/msg00029.html | 2013-03-19 | |
| http://lists.opensuse.org/opensuse-updates/2013-01/msg00079.html | 2013-03-19 | |
| https://access.redhat.com/security/cve/CVE-2011-4966 | 2013-01-08 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=879045 | 2013-01-08 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | * | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | <= 2.2.0 Search vendor "Freeradius" for product "Freeradius" and version " <= 2.2.0" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.1 Search vendor "Freeradius" for product "Freeradius" and version "0.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.2 Search vendor "Freeradius" for product "Freeradius" and version "0.2" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.3 Search vendor "Freeradius" for product "Freeradius" and version "0.3" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.4 Search vendor "Freeradius" for product "Freeradius" and version "0.4" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.5 Search vendor "Freeradius" for product "Freeradius" and version "0.5" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.6 Search vendor "Freeradius" for product "Freeradius" and version "0.6" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.7 Search vendor "Freeradius" for product "Freeradius" and version "0.7" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.7.1 Search vendor "Freeradius" for product "Freeradius" and version "0.7.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.8 Search vendor "Freeradius" for product "Freeradius" and version "0.8" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.8.1 Search vendor "Freeradius" for product "Freeradius" and version "0.8.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.9 Search vendor "Freeradius" for product "Freeradius" and version "0.9" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.9.0 Search vendor "Freeradius" for product "Freeradius" and version "0.9.0" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.9.1 Search vendor "Freeradius" for product "Freeradius" and version "0.9.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.9.2 Search vendor "Freeradius" for product "Freeradius" and version "0.9.2" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 0.9.3 Search vendor "Freeradius" for product "Freeradius" and version "0.9.3" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.0.0 Search vendor "Freeradius" for product "Freeradius" and version "1.0.0" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.0.1 Search vendor "Freeradius" for product "Freeradius" and version "1.0.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.0.2 Search vendor "Freeradius" for product "Freeradius" and version "1.0.2" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.0.3 Search vendor "Freeradius" for product "Freeradius" and version "1.0.3" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.0.4 Search vendor "Freeradius" for product "Freeradius" and version "1.0.4" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.0.5 Search vendor "Freeradius" for product "Freeradius" and version "1.0.5" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.0 Search vendor "Freeradius" for product "Freeradius" and version "1.1.0" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.1 Search vendor "Freeradius" for product "Freeradius" and version "1.1.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.2 Search vendor "Freeradius" for product "Freeradius" and version "1.1.2" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.3 Search vendor "Freeradius" for product "Freeradius" and version "1.1.3" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.4 Search vendor "Freeradius" for product "Freeradius" and version "1.1.4" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.5 Search vendor "Freeradius" for product "Freeradius" and version "1.1.5" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.6 Search vendor "Freeradius" for product "Freeradius" and version "1.1.6" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.7 Search vendor "Freeradius" for product "Freeradius" and version "1.1.7" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 1.1.8 Search vendor "Freeradius" for product "Freeradius" and version "1.1.8" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.0 Search vendor "Freeradius" for product "Freeradius" and version "2.0" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.0.1 Search vendor "Freeradius" for product "Freeradius" and version "2.0.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.0.2 Search vendor "Freeradius" for product "Freeradius" and version "2.0.2" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.0.3 Search vendor "Freeradius" for product "Freeradius" and version "2.0.3" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.0.4 Search vendor "Freeradius" for product "Freeradius" and version "2.0.4" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.0.5 Search vendor "Freeradius" for product "Freeradius" and version "2.0.5" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.0 Search vendor "Freeradius" for product "Freeradius" and version "2.1.0" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.1 Search vendor "Freeradius" for product "Freeradius" and version "2.1.1" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.2 Search vendor "Freeradius" for product "Freeradius" and version "2.1.2" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.3 Search vendor "Freeradius" for product "Freeradius" and version "2.1.3" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.4 Search vendor "Freeradius" for product "Freeradius" and version "2.1.4" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.6 Search vendor "Freeradius" for product "Freeradius" and version "2.1.6" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.7 Search vendor "Freeradius" for product "Freeradius" and version "2.1.7" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.8 Search vendor "Freeradius" for product "Freeradius" and version "2.1.8" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.9 Search vendor "Freeradius" for product "Freeradius" and version "2.1.9" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.10 Search vendor "Freeradius" for product "Freeradius" and version "2.1.10" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.11 Search vendor "Freeradius" for product "Freeradius" and version "2.1.11" | - |
Affected
| ||||||
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | 2.1.12 Search vendor "Freeradius" for product "Freeradius" and version "2.1.12" | - |
Affected
| ||||||