Integer overflow in the jpeg_data_load_data function in jpeg-data.c in libjpeg in exif 0.6.20 allows remote attackers to cause a denial of service (buffer over-read and application crash) or obtain potentially sensitive information via a crafted JPEG file.
http://www.securityfocus.com/bid/54437
http://www.mandriva.com/security/advisories?name=MDVSA-2012:107
http://sourceforge.net/mailarchive/message.php?msg_id=29534027