Security update for xorg-x11-libs (important)

LibXFont was updated to fix security problems that could be used by local
attackers to gain X server privileges (root).

The following security issues have been fixed:

   *

     CVE-2015-1802: The bdf parser reads a count for the number of

properties defined in a font from the font file, and allocates arrays with
entries for each property based on that count. It never checked to see if
that count was negative, or large enough to overflow when multiplied by
the size of the structures being allocated, and could thus allocate the
wrong buffer size, leading to out of bounds writes.

   *

     CVE-2015-1803: If the bdf parser failed to parse the data for the

bitmap for any character, it would proceed with an invalid pointer to the
bitmap data and later crash when trying to read the bitmap from that
pointer.

   *

     CVE-2015-1804: The bdf parser read metrics values as 32-bit

integers, but stored them into 16-bit integers. Overflows could occur in
various operations leading to out-of-bounds memory access.

Security Issues:

   * CVE-2015-1802
     &lt;<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1802">http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1802</a>&gt;
   * CVE-2015-1803
     &lt;<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1803">http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1803</a>&gt;
   * CVE-2015-1804
     &lt;<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1804">http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1804</a>&gt;