Univention Corporate Server 4.3 erratum 315 (security)

This update addresses the following issues:
* The Broadcom Wi-Fi driver in the Linux kernel allows remote attackers to
  execute arbitrary code or cause a denial of service (memory corruption) via
  crafted wireless control message packets, aka internal bug 25662029.
  (CVE-2016-0801)
* A remote code execution vulnerability in the Broadcom Wi-Fi firmware could
  enable a remote attacker to execute arbitrary code within the context of
  the Wi-Fi SoC. This issue is rated as Critical due to the possibility of
  remote code execution in the context of the Wi-Fi SoC. (CVE-2017-0561)
* Broadcom BCM43xx Wi-Fi chips allow remote attackers to execute arbitrary
  code via unspecified vectors, aka the "Broadpwn" issue. (CVE-2017-9417)
* Reinstallation of the pairwise key in the 4-way handshake (CVE-2017-13077)
* Reinstallation of the group key in the 4-way handshake (CVE-2017-13078)
* Reinstallation of the integrity group key in the 4-way handshake
  (CVE-2017-13079)
* Reinstallation of the group key in the group key handshake (CVE-2017-13080)
* Reinstallation of the integrity group key in the group key handshake
  (CVE-2017-13081)