Scott Geary of VendHQ discovered that the Apache HTTPD server used the value of the Proxy header from HTTP requests to initialize the HTTP_PROXY environment variable for CGI scripts, which in turn was incorrectly used by certain HTTP client implementations to configure the

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Debian Security Advisory DSA-3623-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
	
https://www.debian.org/security/                     Salvatore Bonaccorso
July 20, 2016                         https://www.debian.org/security/faq
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Package        : apache2
CVE ID         : CVE-2016-5387

Scott Geary of VendHQ discovered that the Apache HTTPD server used the
value of the Proxy header from HTTP requests to initialize the
HTTP_PROXY environment variable for CGI scripts, which in turn was
incorrectly used by certain HTTP client implementations to configure the
proxy for outgoing HTTP requests. A remote attacker could possibly use
this flaw to redirect HTTP requests performed by a CGI script to an
attacker-controlled proxy via a malicious HTTP request.

For the stable distribution (jessie), this problem has been fixed in
version 2.4.10-10+deb8u5.

We recommend that you upgrade your apache2 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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