Privilege escalation by setting img.src to javascript: URI

2007-03-05T00:00:00
ID MFSA2007-09
Type mozilla
Reporter Mozilla Foundation
Modified 2007-03-05T00:00:00

Description

moz_bug_r_a4 reports that the fix for

MFSA 2006-72 in Firefox 1.5.0.9 and Firefox 2.0.0.1 introduced a regression that allows scripts from web content to execute arbitrary code by setting the src attribute of an IMG tag to a specially crafted javascript: URI. The same regression also caused javascript: URIs in IMG tags to be executed even if JavaScript execution was disabled in the global preferences. This facet was noted by moz_bug_r_a4 and reported independently by Anbo Motohiko. Thunderbird is not affected by this flaw as it will not execute javascript: URIs in IMG tags.