Synkron.web Input Validation Flaw Lets Remote Users Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID: 1006939|
SecurityTracker URL: http://securitytracker.com/id/1006939
(Links to External Site)
Date: Jun 6 2003
Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information|
Exploit Included: Yes |
An input validation vulnerability was reported in the 'Synkron.web' content management software. A remote user can conduct cross-site scripting attacks.|
It is reported that the search module does not properly filter HTML from user-supplied input when displaying search results.
A remote user can conduct a specially crafted search and can then refer to the cached search URL. The URL, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the 'Synkron.web' software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
A demonstration exploit search input is provided:
A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the 'Synkron.web' software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.|
No solution was available at the time of this entry. The author of the report indicates that this flaw was "probably fixed" in version 3.5.|
[Editor's note: we have requested confirmation from the vendor and will update this Alert accordingly.]
Vendor URL: www.synkronweb.com/sw4302.asp (Links to External Site)
Input validation error|
|Underlying OS: Windows (Any)|
Source Message Contents
Subject: [Full-Disclosure] XSS in Synkron.web CMS|
Release Date: 06.06.2003
Application: Synkron.web 3
Vendor Status: Absend
Author: Torben 'Gyrniff' Frohn
Synkron.web 3 is a module based CMS running on IIS.
"Ever since 1997, it has been Synkron's mission to help companies manage on
their own when setting up a presence on the Internet. To achieve this,
Synkron has developed a so-called "Web content management" system, which
everyone with a user-level knowledge of IT can learn to use in less than a
single day." (quote from vendor site.)
The search module do not html encode incoming special characters in the
output. It is not an easy task to exploit because of the POST method used in
the search, but synkron .web have a caching that could be used in an exploit.
Proof of Concept
First visit the search page:
Then search for:
Finally visit the cached page:
N/A, but http://www.synkron.com/ contain links to vulnerable sites.
Unknown but probably fixed in version 3.5.
Vulnerability found by Torben Frohn (Gyrniff)
Full-Disclosure - We believe in it.