1. Summary
The Kaseya version 6.2.0.0 web interface (and possibly other versions) is vulnerable to Cross-Site Scripting in the “adminName” variable.
2. Description
By submitting malicious input such as the following, it is possible to render javascript in the security context of the Kaseya server:
“><sCrIpT>alert(83212)</sCrIpT>
3. Proof of Concept
Use a HTML proxy such as WebScarab or Burp to intercept the HTML form post as it is submitted, and replace the “adminName” with the input above.
4. Impact
Arbitrary JavaScript code may be executed in the security context of the Kaseya web server.
5. Affected Products
“System Version 6.2.0.0” (from information pane of affected web server) and possibly others.
6. Solution
Upgrade to the latest version. According to Kaseya, “The fix was actually deployed with hotfix #1686, Files Released to VSAUpdate, batch 499 on 1/30/2012 6:16:06 PM”
7. Timetable
2011-11-11 Advisory Written. Vendor notified via web form and e-mail.
2012-01-31 Vendor acknowledges flaw.
2012-02-27 Vendor notifies of available fix.
2012-03-01 Attempt to coordinate release of information with vendor
2012-04-20 Published
8. Reference
(to be determined)
9. Credits
bede@foofus.net (Mark Lachniet)