Description
Red Hat Directory Server 7.1 before SP7, Red Hat Directory Server 8, and Fedora Directory Server 1.1.1 allow remote attackers to cause a denial of service (CPU consumption and search outage) via crafted LDAP search requests with patterns, related to a single-threaded regular-expression subsystem.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Enterprise Ipa 1 | redhat-ds-base +1 | 8.0.4-7.el5dsrv | RHSA-2008:0858 |
| Red Hat Directory Server 8 | redhat-ds-admin | 8.0.4-3.el5dsrv | RHSA-2008:0602 |
| Red Hat Directory Server 8 | redhat-ds-base +1 | 8.0.4-7.el5dsrv | RHSA-2008:0602 |
| Red Hat Directory Server 7 | redhat-ds | 7.1SP7-14.RHEL4 | RHSA-2008:0596 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- RedHat 8/9 - Directory Server Crafted Search Pattern Denial of Service EDB-32304 · dos · Aug 27, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- RHSA-2008:0858 Red Hat Security Advisory: redhat-ds-base security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2008:0602 Red Hat Security Advisory: redhat-ds-base and redhat-ds-admin security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2008:0596 Red Hat Security Advisory: Red Hat Directory Server 7.1 Service Pack 7 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
References
- rhds-ldapsearch-dos(44733) vdb-entry
- oval:org.mitre.oval:def:6078 vdb-entry signature
- RHSA-2008:0602 vendor-advisory
- SSRT080113 vendor-advisory
- http://www.redhat.com/docs/manuals/dir-server/release-notes/7.1SP7/index.html
- 31702 third-party-advisory
- RHSA-2008:0596 vendor-advisory
- 31867 third-party-advisory
- ADV-2008-2480 vdb-entry
- 30871 vdb-entry
- FEDORA-2008-7891 vendor-advisory
- RHSA-2008:0858 vendor-advisory
- 1020773 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=454065
- 31565 third-party-advisory
- 31627 third-party-advisory
- FEDORA-2008-7813 vendor-advisory