A JPEG image with a malformed header can crash Opera

2008-12-16T00:00:00
ID OPERA:852
Type opera
Reporter Opera
Modified 2008-12-16T00:00:00

Description

A specially crafted DHT marker in the JPEG file header can causea heap overflow. The malformed image alone will only cause a crash. To exploitthe flaw, the computer's memory must first be filled up withcode of the attacker's choice. This is not trivial to do reliably,so attempted attacks will often cause crashes without succeedingwith the exploit.