Xoops Input Validation Flaw in 'newbb' Module Permits Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1008849
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Jan 26 2004
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Impact: Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Exploit Included: Yes
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Version(s): 2.*
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Description: Ben Drysdale reported an input validation vulnerability in Xoops in the 'newbb' module. A remote user can conduct cross-site scripting attacks.
It is reported that the newbb module does not properly filter HTML code from user-supplied input in the 'forum' and 'topic_id' variables
of 'viewtopic.php'. A remote user can create a specially crafted URL that, 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 Xoops 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.
Some demonstration exploit URLs are provided:
http://[target]/modules/newbb/viewtopic.php?topic_id=14577&forum=2"><s
cript>alert(document.cookie);</script>
http://[target]/modules/newbb/viewtopic.php?topic_id=14577"><script>alert(document.cookie);</script>&forum=2
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the
Xoopos 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.
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Solution: No solution was available at the time of this entry.
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Vendor URL: xoops.org/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: <ben@150bpm.co.uk>
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Message History:
None.
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Source Message Contents
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Date: Mon, 26 Jan 2004 12:28:48 -0000
From: <ben@150bpm.co.uk>
Subject: Xoops newbb module XSS vulnerability
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There is a xss vulnerability in the newbb module of xoops 2.*
http://www.xoops.org/modules/newbb/viewtopic.php?topic_id=14577&forum=2"><script>al
ert(document.cookie);</script>
<http://www.xoops.org/modules/newbb/viewtopic.php?topic_id=14577&forum=2"><script>
alert(document.cookie);</script>>
http://www.xoops.org/modules/newbb/viewtopic.php?topic_id=14577"><script>alert(document
.cookie);</script>&forum=2
<http://www.xoops.org/modules/newbb/viewtopic.php?topic_id=14577"><script>alert(docu
ment.cookie);</script>&forum=2>
Regards,
Ben Drysdale
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