arj - security update

Multiple vulnerabilities have been discovered in arj, an open source
version of the arj archiver. The Common Vulnerabilities and Exposures
project identifies the following problems:

• CVE-2015-0556
  Jakub Wilk discovered that arj follows symlinks created during
  unpacking of an arj archive. A remote attacker could use this flaw
  to perform a directory traversal attack if a user or automated
  system were tricked into processing a specially crafted arj archive.
• CVE-2015-0557
  Jakub Wilk discovered that arj does not sufficiently protect from
  directory traversal while unpacking an arj archive containing file
  paths with multiple leading slashes. A remote attacker could use
  this flaw to write to arbitrary files if a user or automated system
  were tricked into processing a specially crafted arj archive.
• CVE-2015-2782
  Jakub Wilk and Guillem Jover discovered a buffer overflow
  vulnerability in arj. A remote attacker could use this flaw to cause
  an application crash or, possibly, execute arbitrary code with the
  privileges of the user running arj.