selinux-policy when sysctl fs.protected_hardlinks are set to 0 allows local users to cause a denial of service (SSH login prevention) by creating a hardlink to /etc/passwd from a directory named .config, and updating selinux-policy.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-3170 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. 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 | 1.2 |
|---|---|
| Base Metrics | AV:L/AC:H/Au:N/C:N/I:N/A:P |
| Access Vector | Local |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | selinux-policy | Will not fix |
| Red Hat Enterprise Linux 6 | selinux-policy | Not affected |
| Red Hat Enterprise Linux 5 | selinux-policy | Not affected |
Vulmon