Univention Corporate Server 4.2 erratum 326 (security)

This update addresses the following issue:
* Augeas versions up to and including 1.8.0 are vulnerable to heap-based
  buffer overflow due to improper handling of escaped strings. Attacker could
  send crafted strings that would cause the application using augeas to copy
  past the end of a buffer, leading to a crash or possible code execution.
  (CVE-2017-7555)