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Mozilla Foundation Security Advisory 2006-22
Title: CSS Letter-Spacing Heap Overflow Vulnerability
Date: April 13, 2006
Reporter: TippingPoint and the Zero Day Initiative
Products: Firefox, Thunderbird, Mozilla Suite
Fixed in: Firefox 126.96.36.199
Mozilla Suite 1.7.13
An anonymous researcher for TippingPoint and the Zero Day Initiative discovered an integer overflow triggered by the CSS letter-spacing property. This results in in under-allocating memory and ultimately a heap buffer overflow which could be exploited to run code of the attacker's choice.
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