Stack-based buffer overflow in the flattenIncrementally function in flatten.c in xcftools 1.0.4, as reachable from the (1) xcf2pnm and (2) xcf2png utilities, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted image that causes a conversion to a location “above or to the left of the canvas.” NOTE: some of these details are obtained from third party information.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=533361
osvdb.org/55187
secunia.com/advisories/35397
www.securityfocus.com/bid/43883
www.vupen.com/english/advisories/2009/1638
lists.fedoraproject.org/pipermail/package-announce/2010-November/050526.html
lists.fedoraproject.org/pipermail/package-announce/2010-November/050542.html
lists.fedoraproject.org/pipermail/package-announce/2010-November/050562.html