libebml - security update

Several vulnerabilities were discovered in libebml, a library for
manipulating Extensible Binary Meta Language files.

• CVE-2015-8789
  Context-dependent attackers could trigger a use-after-free
  vulnerability by providing a maliciously crafted EBML document.
• CVE-2015-8790
  Context-dependent attackers could obtain sensitive information
  from the process’ heap memory by using a maliciously crafted UTF-8
  string.
• CVE-2015-8791
  Context-dependent attackers could obtain sensitive information
  from the process’ heap memory by using a maliciously crafted
  length value in an EBML id.

For the oldstable distribution (wheezy), these problems have been fixed
in version 1.2.2-2+deb7u1.

For the stable distribution (jessie), these problems have been fixed in
version 1.3.0-2+deb8u1.

For the testing (stretch) and unstable (sid) distributions, these
problems have been fixed in version 1.3.3-1.

We recommend that you upgrade your libebml packages.