TITLE:
Plesk "login_name" Cross-Site Scripting Vulnerability

SECUNIA ADVISORY ID:
SA12368

VERIFY ADVISORY:
http://secunia.com/advisories/12368/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Plesk 7.x
http://secunia.com/product/3833/

DESCRIPTION:
Sourvivor has reported a vulnerability in Plesk, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "login_name" parameter in "login_up.php3" is not
sanitised before being returned to users. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of a vulnerable site by tricking a user into visiting a
malicious website or follow a specially crafted link.

Example:
http://[host]:8443/login_up.php3?login_name=">[code]

The vulnerability has been reported in versions 7.0.0 and 7.1.
Version 6.0 is reportedly not affected.

SOLUTION:
Edit the source to ensure that input is properly sanitised.

Filter malicious characters and character sequences in a proxy server
or firewall with URL filtering capabilities.

PROVIDED AND/OR DISCOVERED BY:
Sourvivor

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