Univention Corporate Server 3.2 erratum 371 (security)

This update addresses the following issues:
* When using the mdb backend, the ldap search erroneously returned
  the base object in some cases. This has been fixed.
* If the slapo-deref overlay is used (which is not the case in 
  a standard UCS installation) and if the list of attributes 
  to be dereferenced is left empty, slapd can be crashed (CVE-2015-1545)
* Denial of service by unauthenticated remote attackers
  via crafted BER data (CVE-2015-6908)