The pam_userdb module for Pam uses a case-insensitive method to compare hashed passwords, which makes it easier for attackers to guess the password via a brute force attack.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2013-7041 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of pam as shipped with Red Hat Enterprise Linux 5 and 5. The Red Hat Security Response Team has rated this issue as having Low security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/ .
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 4.3 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:P/I:N/A:N |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | None |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | pam | Not affected |
| Red Hat Enterprise Linux 6 | pam | Fix deferred |
| Red Hat Enterprise Linux 5 | pam | Fix deferred |
Vulmon