Univention Corporate Server 4.4 erratum 60 (security)

This update addresses the following issues:
* A vulnerability in the Portable Document Format (PDF) scanning
  functionality of Clam AntiVirus (ClamAV) Software could allow an
  unauthenticated, remote attacker to cause a denial of service (DoS)
  condition on an affected device. The vulnerability is due to a lack of
  proper data handling mechanisms within the device buffer while indexing
  remaining file data on an affected device. An attacker could exploit this
  vulnerability by sending crafted PDF files to an affected device. A
  successful exploit could allow the attacker to cause a heap buffer
  out-of-bounds read condition, resulting in a crash that could result in a
  denial of service condition on an affected device. (CVE-2019-1787)
* A vulnerability in the Object Linking & Embedding (OLE2) file scanning
  functionality of Clam AntiVirus (ClamAV) Software could allow an
  unauthenticated, remote attacker to cause a denial of service condition on
  an affected device. The vulnerability is due to a lack of proper input and
  validation checking mechanisms for OLE2 files sent an affected device. An
  attacker could exploit this vulnerability by sending malformed OLE2 files
  to the device running an affected version ClamAV Software. An exploit could
  allow the attacker to cause an out-of-bounds write condition, resulting in
  a crash that could result in a denial of service condition on an affected
  device. (CVE-2019-1788)
* An out-of-bounds heap read condition may occur when scanning PE files (i.e.
  Windows EXE and DLL files) that have been packed using Aspack as a result
  of inadequate bound-checking. (CVE-2019-1789)