Security check of js_ValueToFunctionObject() can be circumvented
- April 13, 2006
- Firefox, SeaMonkey, Thunderbird
- Fixed in
- Firefox 126.96.36.199
- SeaMonkey 1.0.1
- Thunderbird 188.8.131.52
The security check in js_ValueToFunctionObject() can be bypassed by clever use of setTimeout() and the new Firefox 1.5 array method ForEach. shutdown demonstrated how to leverage this into a privilege escalation vulnerability that would allow the installation of malware.
This vulnerability was introduced during Firefox 1.5 development, Firefox 1.0 and Mozilla Suite 1.7 are not affected.
Exploit code and details embargoed during the active update period.