TITLE:
TWiki "%INCLUDE" Shell Command Injection Vulnerability

SECUNIA ADVISORY ID:
SA16980

VERIFY ADVISORY:
http://secunia.com/advisories/16980/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
TWiki
http://secunia.com/product/4248/

DESCRIPTION:
A vulnerability has been reported in TWiki, which can be exploited by
malicious people to compromise a vulnerable system.

Input passed to the "rev" attribute in the "%INCLUDE" variable isn't
properly sanitised before being used in a shell expression. This can
be exploited to inject arbitrary shell commands via e.g. the "|" pipe
character.

Example:
%INCLUDE{ "Main.TWikiUsers" rev="2|[code]" }%

This is related to:
SA16820

The vulnerability has been reported in versions
TWikiRelease03Sep2004, TWikiRelease02Sep2004, TWikiRelease01Sep2004,
and TWikiRelease01Feb2003.

SOLUTION:
Apply patches.
http://twiki.org/cgi-bin/view/Codev/SecurityAlertExecuteCommandsWithInclude

PROVIDED AND/OR DISCOVERED BY:
The vendor credits JChristophFuchs and JoseLuna.

ORIGINAL ADVISORY:
http://twiki.org/cgi-bin/view/Codev/SecurityAlertExecuteCommandsWithInclude

OTHER REFERENCES:
SA16820:
http://secunia.com/advisories/16820/

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