OpenLDAP: Denial of Service vulnerability

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200808-09 / openldap
Release Date	August 08, 2008
Latest Revision	August 08, 2008: 01
Impact	low
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-nds/openldap	< 2.3.43	>= 2.3.43	All supported architectures

Related bugreports: #230269

Synopsis

A flaw in OpenLDAP allows remote unauthenticated attackers to cause a Denial of Service.

2. Impact Information

Background

OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.

Description

Cameron Hotchkies discovered an error within the parsing of ASN.1 BER encoded packets in the "ber_get_next()" function in libraries/liblber/io.c.

Impact

A remote unauthenticated attacker can send a specially crafted ASN.1 BER encoded packet which will trigger the error and cause an "assert()", terminating the "slapd" daemon.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All OpenLDAP users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-nds/openldap-2.3.43"

4. References

CVE-2008-2952

Page updated August 08, 2008

Summary: This is a Gentoo Linux Security Advisory

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