Description
OpenLDAP before 2.3.39 allows remote attackers to cause a denial of service (slapd crash) via an LDAP request with a malformed objectClasses attribute. NOTE: this has been reported as a double free, but the reports are inconsistent.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 4.0 | openldap2.3 | 2.3.30-5+etch1 | DSA-1541-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | compat-openldap | 2.3.27_2.2.29-8.el5_1.1 | RHSA-2007:1037 |
| RHEL 5 | openldap +4 | 2.3.27-8.el5_1.1 | RHSA-2007:1037 |
| RHEL 4 | compat-openldap | 2.1.30-8.el4_6.1 | RHSA-2007:1038 |
| RHEL 4 | openldap +4 | 2.2.13-8.el4_6.1 | RHSA-2007:1038 |
Advisories 3
- RHSA-2007:1037 Red Hat Security Advisory: openldap security and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:1038 Red Hat Security Advisory: openldap security and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1541-1 openldap2.3 Debian Security (DSA / DLA) · Mar 9, 2026
References
- 27683 third-party-advisory
- 1018924 vdb-entry
- 29461 third-party-advisory
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=5119
- MDKSA-2007:215 vendor-advisory
- oval:org.mitre.oval:def:10183 vdb-entry signature
- 29682 third-party-advisory
- 27756 third-party-advisory
- GLSA-200803-28 vendor-advisory
- DSA-1541 vendor-advisory
- SUSE-SR:2007:024 vendor-advisory
- 27596 third-party-advisory
- ADV-2009-3184 vdb-entry
- [openldap-announce] 20071026 OpenLDAP 2.3.39 available mailing-list
- 27424 third-party-advisory
- RHSA-2007:1038 vendor-advisory
- APPLE-SA-2009-11-09-1 vendor-advisory
- USN-551-1 vendor-advisory
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=440632
- ADV-2007-3645 vdb-entry
- RHSA-2007:1037 vendor-advisory
- 26245 vdb-entry
- FEDORA-2007-741 vendor-advisory
- http://support.apple.com/kb/HT3937
- 27587 third-party-advisory
- 27868 third-party-advisory