GLSA 200704-08: DokuWiki: Cross-site scripting vulnerability

http://security.gentoo.org/

Severity:	low
Title:	DokuWiki: Cross-site scripting vulnerability
Date:	04/12/2007
Bugs:	#163781
ID:	200704-08

Synopsis

DokuWiki is vulnerable to a cross-site scripting attack.

Background

DokuWiki is a simple to use wiki aimed at creating documentation.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
www-apps/dokuwiki	< 20061106	>= 20061106	All supported architectures

Description

DokuWiki does not sanitize user input to the GET variable 'media' in the fetch.php file.

Impact

An attacker could entice a user to click a specially crafted link and inject CRLF characters into the variable. This would allow the creation of new lines or fields in the returned HTTP Response header, which would permit the attacker to execute arbitrary scripts in the context of the user's browser.

Workaround

Replace the following line in lib/exe/fetch.php:

$MEDIA = getID('media',false); // no cleaning - maybe external

with

$MEDIA = preg_replace('/[\x00-\x1F]+/s','',getID('media',false));

Resolution

All DokuWiki users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-apps/dokuwiki-20061106"

References

CVE-2006-6965

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200704-08.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.