Description
slapd in OpenLDAP before 2.4.30 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via an LDAP search query with attrsOnly set to true, which causes empty attributes to be returned.
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 14 | openldap | 2.4.31-1 | — |
| Debian 13 | openldap | 2.4.31-1 | — |
| Debian 12 | openldap | 2.4.31-1 | — |
| Debian 6.0 | openldap | 2.4.23-7.3+deb6u1 | DLA-203-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | openldap +4 | 2.4.23-26.el6 | RHSA-2012:0899 |
Advisories 2
- RHSA-2012:0899 Red Hat Security Advisory: openldap security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-203-1 openldap - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- GLSA-201406-36 vendor-advisory
- 49607 third-party-advisory
- 48372 third-party-advisory
- MDVSA-2012:130 vendor-advisory
- http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7143
- RHSA-2012:0899 vendor-advisory
- 52404 vdb-entry
- http://www.openldap.org/software/release/changes.html
- https://support.apple.com/kb/HT210788
- 20191211 APPLE-SA-2019-12-10-3 macOS Catalina 10.15.2, Security Update 2019-002 Mojave, Security Update 2019-007 High Sierra mailing-list
- 20191213 APPLE-SA-2019-12-10-3 macOS Catalina 10.15.2, Security Update 2019-002 Mojave, Security Update 2019-007 High Sierra mailing-list