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TWiki Restricted Content Access and Denial of Service
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Secunia Advisory:
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SA19410
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Release Date:
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2006-03-27
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Popularity:
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7,135 views
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Critical:
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Moderately critical
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Impact:
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Security Bypass
DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | TWiki
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2006-1386
CVE-2006-1387
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Description:
A vulnerability and a security issue have been reported in TWiki, which can be exploited by malicious people to cause a DoS (Denial of Service) and bypass certain security restrictions.
1) The problem is that it is possible to view restricted content via the rdiff and preview scripts.
Example:
http://[host]/bin/preview/[restricted content]/WebHome?action=foo
The security issue has been reported in releases TWikiRelease04x00x01 and TWikiRelease04x00x00.
2) An error in the handling of circular references for the "%INCLUDE" statement can be exploited to cause an infinite recursion and consume a large amount of memory resources on a vulnerable system by supplying a URL which references itself.
The vulnerability has been reported in the following releases:
* TWikiRelease04x00x01
* TWikiRelease04x00x00
* TWikiRelease04Sep2004
* TWikiRelease03Sep2004
* TWikiRelease02Sep2004
* TWikiRelease01Sep2004
* TWikiRelease01Feb2003
* TWikiRelease01Dec2001
* TWikiRelease01Sep2001
Solution:
Apply patches (see vendor advisories).
The vulnerability and the security issue will also be fixed in the upcoming 4.0.2 version.
Provided and/or discovered by:
The vendor credits:
1) Sergej Zagursky and Steffen Poulsen
2) Kenneth Lavrsen
Original Advisory:
1) http://twiki.org/cgi-bin/view/Codev/SecurityAlertTWiki4RdiffPreviewAccess
2) http://twiki.org/cgi-bin/view/Codev/SecurityAdvisoryDosAttackWithInclude
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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