Univention Corporate Server 4.3 erratum 138 (security)

This update addresses the following issues:
* Heap-based Buffer Overflow in SIGCOMP dissector crash in packet-sigcomp.c
  (CVE-2018-7320)
* Out of bounds access in UMTS MAC dissector in packet-umts_mac.c
  (CVE-2018-7334)
* IEEE 802.11 dissector crash in airpdcap.c (CVE-2018-7335)
* NBAP dissector crash in nbap.cnf (CVE-2018-7419)
* NBAP dissector crash in epan/dissectors/packet-nbap.c (CVE-2018-9261)
* Memory leak in ui/failure_message.c (CVE-2018-9264)
* Memory leak in epan/dissectors/packet-pcp.c (CVE-2018-9273)
* Use after free in packet-q931.c (CVE-2018-11358)
* Heap-based Buffer Overflow in packet-gsm_a_dtap.c (CVE-2018-11360)
* Out-of-bounds read in packet-ldss.c (CVE-2018-11362)