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Sawmill XSS vuln
From: Mark Terry <Mark.Terry () nta-monitor com>
Date: Mon, 12 Sep 2005 15:57:50 +0100

Bugtraq,

This has been delayed until the vendor had released a new version:

<<<<SNIP>>>>>
Date: Fri, 26 Aug 2005 11:48:48 -0700
From: Greg Ferrar <ferrar () flowerfire com>
User-Agent: Mozilla Thunderbird 1.0.2 (Macintosh/20050317)
X-Accept-Language: en-us, en
To: Terence.Wong () nta-monitor com
Cc: support () sawmill co uk
Subject: Re: FW: XSS vulnerability
X-Scanned-By: MIMEDefang 2.48 on 192.168.124.1

Terence,

Thank you for reporting this vulerability in Sawmill. We have researched

this, and verified this vulnerability. This vulnerability exists in
Sawmill version 7.0.0 through 7.1.13. All platforms, including Windows,
are vulerable to this attack.

We have fixed this in the latest internal version, by replacing < and
&lt; and > with &gt;, and & with &amp;, in the error message. You can
get a pre-release with the fix from http://sawmill.net/prerelease.html .

We plan to ship Sawmill 7.1.14 next week, probably next Friday. It is
possible it will be delayed by as much as a week. So as a tentative
timeline, can we aim for release in two weeks, or earlier if 7.1.14
becomes available before then?

Greg

<<<<<SNIP>>>




Sawmill XSS Vulnerability

[Overview]

The web administration page for the Sawmil log analysis software is vulnerable to an XSS attack. The attacker does not need to be authenticated to perform this attack

[Vulnerability Details]

Sawmill's built in webserver assumes that any query string appended to a GET request is a configuration command. This query string is not validated correctly for HTML tags so an attacker can use <script> tags to alter the output that is displayed to the browser.

Possible attacks are varied, and can include creating a false login page to capture authentication details.

Example simple attack:

http://host/?bla=%3Cscript%3Ealert('XSS');%3C/script%3E

[Affected Versions]

Version 7.1.13 (and below?) is affected by this vulnerability.

The previous version 6.5.11 is not affected by this issue. The latest version 7.1.14 is not affected by this issue.

At this time only the windows and the source code (on linux) download versions have been tested.

[Solution]

Upgrade to version 7.1.14 or newer.

[Timeline]

The vulnerability was first discovered on 22nd August 2005. Fix availible on 8th September 2005.

[References]

http://www.nta-monitor.com/news/xss/sawmill/index.htm

http://www.sawmill.net

Mark Terry

Research and Development
NTA Monitor Ltd
14 Ashford House,
Beaufort Court,
Medway City Estate,
Rochester,
Kent ME2 4FA, UK

Email: mark.terry () nta-monitor com
WWW:   http://www.nta-monitor.com

Tel:   01634 721855
Fax:   01634 721844


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