libtiff: Security Advisory - CVE-2012-4564

libtiff: Security Advisory - CVE-2012-4564

v2 changes:
* update format for commit log
* add Upstream-Status for patch

ppm2tiff does not check the return value of the TIFFScanlineSize
function, which allows remote attackers to cause a denial of service
(crash) and possibly execute arbitrary code via a crafted PPM image that
triggers an integer overflow, a zero-memory allocation, and a heap-based
buffer overflow.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-4564

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>