libarchive - security update

Several security vulnerabilities have been discovered in libarchive,
a multi-format archive and compression library. An attacker could
take advantage of these flaws to cause an out of bounds read or a
denial of service against an application using the libarchive12
library using a carefully crafted input file.

• CVE-2015-8915
  Paris Zoumpouloglou of Project Zero labs discovered a flaw in
  libarchive bsdtar. Using a crafted file bsdtar can perform an
  out-of-bounds memory read which will lead to a SEGFAULT.
• CVE-2016-7166
  Alexander Cherepanov discovered a flaw in libarchive compression
  handling. Using a crafted gzip file, one can get libarchive to
  invoke an infinite chain of gzip compressors until all the memory
  has been exhausted or another resource limit kicks in.

For Debian 7 Wheezy, these problems have been fixed in version
3.0.4-3+wheezy3.

We recommend that you upgrade your libarchive packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;