dbus - security update

Alban Crequy and Simon McVittie discovered several vulnerabilities in
the D-Bus message daemon.

• CVE-2014-3635
  On 64-bit platforms, file descriptor passing could be abused by
  local users to cause heap corruption in dbus-daemon,
  leading to a crash, or potentially to arbitrary code execution.
• CVE-2014-3636
  A denial-of-service vulnerability in dbus-daemon allowed local
  attackers to prevent new connections to dbus-daemon, or disconnect
  existing clients, by exhausting descriptor limits.
• CVE-2014-3637
  Malicious local users could create D-Bus connections to
  dbus-daemon which could not be terminated by killing the
  participating processes, resulting in a denial-of-service
  vulnerability.
• CVE-2014-3638
  dbus-daemon suffered from a denial-of-service vulnerability in the
  code which tracks which messages expect a reply, allowing local
  attackers to reduce the performance of dbus-daemon.
• CVE-2014-3639
  dbus-daemon did not properly reject malicious connections from
  local users, resulting in a denial-of-service vulnerability.

For the stable distribution (wheezy), these problems have been fixed in
version 1.6.8-1+deb7u4.

For the unstable distribution (sid), these problems have been fixed in
version 1.8.8-1.

We recommend that you upgrade your dbus packages.