Malformed bitmaps can reveal old data from random places in memory

2008-12-16T00:00:00
ID OPERA:876
Type opera
Reporter Opera
Modified 2008-12-16T00:00:00

Description

Specially malformed bitmap images can cause Opera to render the image using a palette made up from uninitialized memory. Using canvas, the pattern can be read and analyzed by JavaScript, so an attacker can get random samples of the user's memory, which may contain data.