Tom Ferris has discovered a weakness in Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service).
The weakness is caused due to an error in the handling of overly large size attributes in the "Iframe" tag. This can be exploited to crash a vulnerable browser via a specially crafted "Iframe" tag on a malicious web site.
The weakness has been confirmed in version 1.0.7 on Fedora Core 4 (Linux). Other versions and platforms may also be affected.
NOTE: The vendor has concluded that the weakness is caused due to an infinite recursion which causes a stack overflow, which only can be exploited to crash a vulnerable browser and cannot be exploited for code execution.
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Subject: Mozilla Firefox Iframe Size Denial of Service Weakness
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