Gentoo alert: OpenLDAP DoS Vulnerability

Posted by dave on Mar 31, 2004 3:06 AM EDT
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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.

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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200403-12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal Title: OpenLDAP DoS Vulnerability Date: March 31, 2004 Bugs: #26728 ID: 200403-12

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Synopsis ========

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.

Background ==========

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 / Vulnerable / Unaffected ------------------------------------------------------------------- net-nds/openldap <= 2.1.12 >= 2.1.13

Description ===========

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.

Impact ======

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

Workaround ==========

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

Resolution ==========

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"

References ==========

[ 1 ] http://www.openldap.org/its/index.cgi?findid=2390

Concerns? =========

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to [e-mail:security@gentoo.org] or alternatively, you may file a bug at http://bugs.gentoo.org. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux)

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