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[ GLSA 200403-12 ] OpenLDAP DoS Vulnerability
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Joined: 13 Jun 2003
Posts: 4087
Location: Dresden, Germany

PostPosted: Wed Mar 31, 2004 11:06 am    Post subject: [ GLSA 200403-12 ] OpenLDAP DoS Vulnerability Reply with quote

Gentoo Linux Security Advisory

Title: OpenLDAP DoS Vulnerability (GLSA 200403-12)
Severity: normal
Exploitable: remote
Date: March 31, 2004
Updated: May 22, 2006
Bug(s): #26728
ID: 200403-12


A failed password operation can cause the OpenLDAP slapd server, if it is using the back-ldbm backend, to free memory that was never allocated.


OpenLDAP is a suite of LDAP-related application and development tools. It includes slapd (the standalone LDAP server), slurpd (the standalone LDAP replication server), and various LDAP libraries, utilities and example clients.

Affected Packages

Package: net-nds/openldap
Vulnerable: <= 2.1.12
Unaffected: >= 2.1.13
Architectures: All supported architectures


A password extended operation (password EXOP) which fails will cause the slapd server to free() an uninitialized pointer, possibly resulting in a segfault. This only affects servers using the back-ldbm backend. Such a crash is not guaranteed with every failed operation, however, it is possible.


An attacker (or indeed, a normal user) may crash the OpenLDAP server, creating a Denial of Service condition.


A workaround is not currently known for this issue. All users are advised to upgrade to the latest version of the affected package.


OpenLDAP users should upgrade to version 2.1.13 or later:
# emerge sync
# emerge -pv ">=net-nds/openldap-2.1.13"
# emerge ">=net-nds/openldap-2.1.13"


OpenLDAP ITS Bug and Patch

Last edited by GLSA on Tue May 23, 2006 4:16 am; edited 2 times in total
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