[Bug 1203719] New: CVE-2015-1804 libXfont: out-of-bounds memory access in bdfReadCharacters

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1203719

            Bug ID: 1203719
           Summary: CVE-2015-1804 libXfont: out-of-bounds memory access in
                    bdfReadCharacters
           Product: Security Response
         Component: vulnerability
          Keywords: Security
          Severity: medium
          Priority: medium
          Assignee: security-response-team at redhat.com
          Reporter: mprpic at redhat.com
                CC: btissoir at redhat.com,
                    fonts-bugs at lists.fedoraproject.org,
                    sandmann at redhat.com



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.

A local user could exploit this issue to potentially execute arbitrary code
with the privileges of the X.Org server.

Upstream advisory:

http://seclists.org/oss-sec/2015/q1/865

Upstream patch:

http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=2351c83a77a478b49cba6beb2ad386835e264744

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