==========================================================================
Ubuntu Security Notice USN-2622-1
May 26, 2015

openldap vulnerabilities
==========================================================================

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

- Ubuntu 15.04
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

OpenLDAP could be made to crash if it received specially crafted network
traffic.

Software Description:
- openldap: OpenLDAP utilities

Details:

It was discovered that OpenLDAP incorrectly handled certain search queries
that returned empty attributes. A remote attacker could use this issue to
cause OpenLDAP to assert, resulting in a denial of service. This issue only
affected Ubuntu 12.04 LTS. (CVE-2012-1164)

Michael Vishchers discovered that OpenLDAP improperly counted references
when the rwm overlay was used. A remote attacker could use this issue to
cause OpenLDAP to crash, resulting in a denial of service. (CVE-2013-4449)

It was discovered that OpenLDAP incorrectly handled certain empty attribute
lists in search requests. A remote attacker could use this issue to cause
OpenLDAP to crash, resulting in a denial of service. (CVE-2015-1545)

Update instructions:

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

Ubuntu 15.04:
  slapd                           2.4.31-1+nmu2ubuntu12.1

Ubuntu 14.10:
  slapd                           2.4.31-1+nmu2ubuntu11.1

Ubuntu 14.04 LTS:
  slapd                           2.4.31-1+nmu2ubuntu8.1

Ubuntu 12.04 LTS:
  slapd                           2.4.28-1.1ubuntu4.5

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

References:
  http://www.ubuntu.com/usn/usn-2622-1
  CVE-2012-1164, CVE-2013-4449, CVE-2015-1545

Package Information:
  https://launchpad.net/ubuntu/+source/openldap/2.4.31-1+nmu2ubuntu12.1
  https://launchpad.net/ubuntu/+source/openldap/2.4.31-1+nmu2ubuntu11.1
  https://launchpad.net/ubuntu/+source/openldap/2.4.31-1+nmu2ubuntu8.1
  https://launchpad.net/ubuntu/+source/openldap/2.4.28-1.1ubuntu4.5