Mozilla Foundation Security Advisory 2009-49
Title: TreeColumns dangling pointer vulnerability
Announced: September 9, 2009
Reporter: TippingPoint ZDI
Fixed in: Firefox 3.5.3
An anonymous security researcher, via TippingPoint's Zero Day Initiative, reported that the columns of a XUL tree element could be manipulated in a particular way which would leave a pointer owned by the column pointing to freed memory. An attacker could potentially use this vulnerability to crash a victim's browser and run arbitrary code on the victim's computer.