The ij_untrusted_url function in JunkBuster 2.0.2-r2, with single-threaded mode enabled, allows remote attackers to overwrite the referrer field via a crafted HTTP request.
https://exchange.xforce.ibmcloud.com/vulnerabilities/20093
http://www.securityfocus.com/bid/13147
http://www.gentoo.org/security/en/glsa/glsa-200504-11.xml
http://www.debian.org/security/2005/dsa-713