CGI web servers assign Proxy header values from client requests to internal HTTP_PROXY environment variables

Overview Web servers running in a CGI or CGI-like context may assign client request Proxy header values to internal HTTPPROXY environment variables. This vulnerability can be leveraged to conduct man-in-the-middle MITM attacks on internal subrequests or to direct the server to initiate connection...

UBUNTU-CVE-2016-1000111

Twisted before 16.3.1 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTPPROXY environment variable, which might allow remote attackers to redirect a CGI application's outbou...

Apache Httpd < 2.2.32 : HTTP_PROXY environment variable "httpoxy" mitigation

HTTPPROXY is a well-defined environment variable in a CGI process, which collided with a number of libraries which failed to avoid colliding with this CGI namespace. A mitigation is provided for the httpd CGI environment to avoid populating the "HTTPPROXY" variable from a "Proxy:" header, which h...

DEBIAN-CVE-2013-2503

Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 aka Proxy Authentication Required HTTP status code...

Authorization

Trend Micro InterScan Web Security Virtual Appliance IWSVA 3.x and InterScan Web Security Suite IWSS 3.x, when basic authorization is enabled on the standalone proxy, forwards the Proxy-Authorization header from Windows Media Player, which allows remote web servers to obtain credentials by offeri...