Vulnerability Instance

As part of the Firefox 1.5 release we fixed several crash bugs to
improve the stability of the product. Some of these crashes showed
evidence of memory corruption that we presume could be exploited
to run arbitrary code and have been applied to the Firefox 1.0.x
and Mozilla Suite 1.7.x releasesWhile fixing an unexploitable recursion-induced crash Bernd Mielke
discovered that the CSS border-rendering code could potentially write
past the end of an array.Alden D'Souza reported a crash when using an extremely large
regular expression in JavaScript. This was tracked down to a 16-bit
integer overflow that could potentially cause the browser to interpret
attacker supplied data as JavaScript bytecode.Martijn Wargers found two potentially exploitable crashes when programmatically
changing the -moz-grid and -moz-grid-group display styles.Bob Clary found a memory corruption crash using the InstallTrigger.install()
method that was introduced in Firefox 1.0.7 by one of the regression
fixes described in MFSA 2005-58.Thunderbird shares the browser engine with Firefox
and could be vulnerable if JavaScript were to be enabled in mail. This is not
the default setting and we strongly discourage users from running
JavaScript in mail.