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Ubuntu Security Notice USN-1266-1
November 17, 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

Summary:

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

Details:

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

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

References:
http://www.ubuntu.com/usn/usn-1266-1
CVE-2011-4079

Package Information:
https://launchpad.net/ubuntu/+source/openldap/2.4.25-1.1ubuntu4.1
https://launchpad.net/ubuntu/+source/openldap/2.4.23-6ubuntu6.1
https://launchpad.net/ubuntu/+source/openldap/2.4.23-0ubuntu3.7
https://launchpad.net/ubuntu/+source/openldap/2.4.21-0ubuntu5.6