It was discovered that the _unix_run_helper_binary() function of PAM's unix_pam module could write to a blocking pipe, possibly causing the function to become unresponsive. An attacker able to supply large passwords to the unix_pam module could use this flaw to enumerate valid user accounts, or cause a denial of service on the system.
Find out more about CVE-2015-3238 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 6.4 |
|---|---|
| Base Metrics | AV:N/AC:L/Au:N/C:P/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (pam) | RHSA-2015:1640 | 2015-08-18 |
| Red Hat Enterprise Linux 6 (pam) | RHSA-2015:1640 | 2015-08-18 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | pam | Will not fix |
Vulmon