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OpenLDAP: Denial of Service vulnerability


1.  Gentoo Linux Security Advisory

Version Information

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


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

2.  Impact Information


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


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.


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


There is no known workaround at this time.


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


Page updated August 08, 2008

Summary: This is a Gentoo Linux Security Advisory

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