Integer overflow in the FORMATS Plugin before 4.23 for IrfanView allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a large XPM file that triggers a heap-based buffer overflow.
https://exchange.xforce.ibmcloud.com/vulnerabilities/49717
http://www.vupen.com/english/advisories/2009/0953
http://www.securityfocus.com/bid/34402
http://www.securityfocus.com/archive/1/502516/100/0/threaded
http://www.irfanview.com/plugins.htm