The rwm overlay in OpenLDAP 2.4.23, 2.4.36, and earlier does not properly count references, which allows remote attackers to cause a denial of service (slapd crash) by unbinding immediately after a search request, which triggers rwm_conn_destroy to free the session context while it is being used by rwm_op_search.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2013-4449 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 4.3 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| 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 | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 6 (openldap) | RHSA-2014:0126 | 2014-02-03 |
| Red Hat Enterprise Linux 5 (openldap) | RHSA-2014:0206 | 2014-02-24 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | openldap | Not affected |
Vulmon