Integer Overflow in XSLT Node Sorting — Mozilla

Security researcher Martin Barbella reported via TippingPoint’s Zero Day Initiative that an XSLT node sorting routine contained an integer overflow vulnerability. In cases where one of the nodes to be sorted contained a very large text value, the integer used to allocate a memory buffer to store its value would overflow, resulting in too small a buffer being created. An attacker could use this vulnerability to write data past the end of the buffer, causing the browser to crash and potentially running arbitrary code on a victim’s computer.