The canonicalize_username function in svnserve/cyrus_auth.c in Apache Subversion before 1.8.16 and 1.9.x before 1.9.4, when Cyrus SASL authentication is used, allows remote attackers to authenticate and bypass intended access restrictions via a realm string that is a prefix of an expected repository realm string.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2016-2167 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 3.6 |
|---|---|
| Base Metrics | AV:N/AC:H/Au:S/C:P/I:P/A:N |
| Access Vector | Network |
| Access Complexity | High |
| Authentication | Single |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| 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 | subversion | Will not fix |
| Red Hat Enterprise Linux 6 | subversion | Will not fix |
| Red Hat Enterprise Linux 5 | subversion | Will not fix |
Vulmon