Arch Linux: ASA-201609-21 Medium: tomcat7 Proxy Injection Risk

Arch Linux Security Advisory ASA-201609-21
=========================================
Severity: Medium
Date    : 2016-09-22
CVE-ID  : CVE-2016-5388
Package : tomcat7
Type    : proxy injection
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package tomcat7 before version 7.0.72-1 is vulnerable to proxy
injection.

Resolution
=========
Upgrade to 7.0.72-1.

# pacman -Syu "tomcat7>=7.0.72-1"

The problems have been fixed upstream in version 7.0.72.

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