pnmtopng in netpbm before 10.25, when using the -trans option, uses uninitialized size and index variables when converting Portable Anymap (PNM) images to Portable Network Graphics (PNG), which might allow attackers to execute arbitrary code by modifying the stack.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10135
http://www.vupen.com/english/advisories/2005/2133
http://www.securityfocus.com/bid/15128
http://www.redhat.com/support/errata/RHSA-2005-793.html
http://www.novell.com/linux/security/advisories/2005_24_sr.html
http://www.gentoo.org/security/en/glsa/glsa-200510-18.xml
http://www.debian.org/security/2005/dsa-878
http://securitytracker.com/id?1015071
http://secunia.com/advisories/17357
http://secunia.com/advisories/17282
http://secunia.com/advisories/17265
http://secunia.com/advisories/17256