Imager (libimager-perl) before 0.50 allows user-assisted attackers to cause a denial of service (segmentation fault) by writing a 2- or 4-channel JPEG image (or a 2-channel TGA image) to a scalar, which triggers a NULL pointer dereference.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25717
http://www.vupen.com/english/advisories/2006/1294
http://www.debian.org/security/2006/dsa-1028
http://secunia.com/advisories/19577
http://secunia.com/advisories/19575