[arch-security] [ASA-201611-6] tomcat6: proxy injection

[Levente Polyak]

Arch Linux Security Advisory ASA-201611-6
=========================================

Severity: Medium
Date    : 2016-11-02
CVE-ID  : CVE-2016-5388
Package : tomcat6
Type    : proxy injection
Remote  : Yes
Link    : https://wiki.archlinux.org/index.php/CVE

Summary
=======

The package tomcat6 before version 6.0.47-1 is vulnerable to proxy
injection.

Resolution
==========

Upgrade to 6.0.47-1.

# pacman -Syu "tomcat6>=6.0.47-1"

The problem has been fixed upstream in version 6.0.47.

Workaround
==========

None.

Description
===========

It was discovered that tomcat 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.

Impact
======

A remote attacker is able to use this flaw to redirect HTTP requests
performed by a CGI script to an attacker-controlled proxy via a
malicious HTTP request.

References
==========

https://www.apache.org/security/asf-httpoxy-response.txt
https://access.redhat.com/security/cve/CVE-2016-5388

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