Description
The BDB backend for slapd in OpenLDAP before 2.3.36 allows remote authenticated users to cause a denial of service (crash) via a potentially-successful modify operation with the NOOP control set to critical, possibly due to a double free vulnerability.
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_1.3 | RHSA-2008:0110 |
| RHEL 5 | openldap +4 | 2.3.27-8.el5_1.3 | RHSA-2008:0110 |
| RHEL 4 | compat-openldap | 2.1.30-8.el4_6.4 | RHSA-2008:0110 |
| RHEL 4 | openldap +4 | 2.2.13-8.el4_6.4 | RHSA-2008:0110 |
Advisories 2
- RHSA-2008:0110 Red Hat Security Advisory: openldap security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1541-1 openldap2.3 Debian Security (DSA / DLA) · Mar 9, 2026
References
- SUSE-SR:2008:010 vendor-advisory
- MDVSA-2008:058 vendor-advisory
- 29225 third-party-advisory
- 1019480 vdb-entry
- [openldap-bugs] 20070411 (ITS#4925) Modify operation with NOOP control on a BDB backend causes slapd to crash mailing-list
- 28817 third-party-advisory
- http://wiki.rpath.com/Advisories:rPSA-2008-0059
- 29682 third-party-advisory
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0059
- 29256 third-party-advisory
- 20080212 rPSA-2008-0059-1 openldap openldap-clients openldap-servers mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=431203
- 29068 third-party-advisory
- USN-584-1 vendor-advisory
- RHSA-2008:0110 vendor-advisory
- 28953 third-party-advisory
- DSA-1541 vendor-advisory
- oval:org.mitre.oval:def:10748 vdb-entry signature
- FEDORA-2008-1307 vendor-advisory
- [openldap-bugs] 20070411 Re: (ITS#4925) Modify operation with NOOP control on a BDB backend causes slapd to crash mailing-list
- ADV-2009-3184 vdb-entry
- APPLE-SA-2009-11-09-1 vendor-advisory
- 29957 third-party-advisory
- 26245 vdb-entry
- http://support.apple.com/kb/HT3937