Secunia

Some vulnerabilities have been reported in DokuWiki, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.

Input passed to the "w" and "h" parameters in lib/exec/fetch.php is not properly sanitised before being passed as resize parameters to the "convert" application. This can be exploited to cause a DoS due to excessive CPU and memory consumption by passing very large numbers, or to inject arbitrary shell commands by passing specially crafted strings to the "w" and "h" parameter.

Successful exploitation requires that the "$conf[imconvert]" option is set.

Solution
Update to version 2006-03-09e.
Further details available in Customer Area

Provided and/or discovered by
DoS vulnerability reported by Thomas Kindler.
Command injection reported by the vendor.

Changelog
Further details available in Customer Area

Original Advisory
http://bugs.splitbrain.org/?do=details&id=924
http://bugs.splitbrain.org/?do=details&id=926

Deep Links
Links available in Customer Area