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Firefox array_join CVE-2012-0464
March 20, 2012
03:03
bashed

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Forum Posts: 1
Member Since:
March 20, 2012
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Hey,

I was wondering if someone could help me with this. I'm trying to understand a vulnerability in firefox 10.0.2. The following link contains my questions. http://pastebin.com/XZcaJZYv


April 19, 2012
23:19
ihnames

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Forum Posts: 1
Member Since:
April 18, 2012
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Hello bashed, hello Corelan-Forum!

 

I too am curious about the firefox array.join("") problem, but I wasn't able to find much about it (neither further info on the internet nor clear indications in the code).  In particular, I was wondering if it is certain that the root of the problem is found in array_join and not in, say array_toString_sub? Couldn't the change from js_ValueToString() to ToString() in array_join just be an optimization?

Also, how would you clear the string in (the replaced) String.prototype.toString? You couldn't just delete it, since function-arguments can't be deleted in js.

Sorry for bringing more questions and no answers, but maybe it helps to sparking a discussion…

Best regards,

Ihn

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