The remote host may be tricked into running an executable file.
The remote host is running perlDesk, a web-based help desk application implemented in Perl. It is reported that perlDesk is prone to a service-side script execution vulnerability. If an attacker manages to store a script on the remote server, he may execute it through the 'lang' URI parameter of perlDesk. Otherwise, he may use this vulnerability for information disclosure purposes.
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