mozilla -- SOAPParameter integer overflow

zen-parse discovered and iDEFENSE reported an exploitable
integer overflow in a scriptable Mozilla component
`SOAPParameter’:

Improper input validation to the SOAPParameter object
constructor in Netscape and Mozilla allows execution of
arbitrary code. The SOAPParameter object’s constructor
contains an integer overflow which allows controllable
heap corruption. A web page can be constructed to
leverage this into remote execution of arbitrary code.