USN-1266-1: OpenLDAP vulnerability

17 November 2011

openldap vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


An OpenLDAP server could potentially be made to crash if it received specially crafted network traffic from an authenticated user.

Software Description

  • openldap - OpenLDAP utilities


It was discovered that slapd contained an off-by-one error. An authenticated attacker could potentially exploit this by sending a crafted crafted LDIF entry containing an empty postalAddress.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.10
slapd - 2.4.25-1.1ubuntu4.1
Ubuntu 11.04
slapd - 2.4.23-6ubuntu6.1
Ubuntu 10.10
slapd - 2.4.23-0ubuntu3.7
Ubuntu 10.04 LTS
slapd - 2.4.21-0ubuntu5.6

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.