Buffer overflow in the get_string_ahref function for ProZilla 1.3.7.4 and possibly earlier, with the -ftpsearch option enabled, allows remote servers to execute arbitrary code via a search response with a crafted string in the HREF field of an <A> tag.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22491
http://www.securityfocus.com/bid/14993
http://www.debian.org/security/2005/dsa-834