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.
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
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
