CVE-2016-6287
The "http-client" egg always used a HTTP_PROXY environment variable to determine whether HTTP traffic should be routed via a proxy, even when running as a CGI process. Under several web servers this would mean a user-supplied "Proxy" header could allow an attacker to direct all HTTP requests through a proxy (also known as a "httpoxy" attack). This affects all versions of http-client before 0.10.
Date published : 2017-01-10
http://www.securityfocus.com/bid/92105
http://lists.gnu.org/archive/html/chicken-announce/2016-07/msg00000.html