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Date: Wed, 24 Sep 2014 18:30:35 +0200
From: Florian Weimer <>
Subject: Re: CVE-2014-6271: remote code execution through bash

On 09/24/2014 06:23 PM, Michal Zalewski wrote:
> Note that on Linux systems where /bin/sh is symlinked to /bin/bash,
> any popen() / system() calls from within languages such as PHP would
> be of concern due to the ability to control HTTP_* in the env.

This depends on how PHP is invoked.  mod_php does not set the CGI 
environment variables.

However, it is true that if CGI programs spawn subprocesses, they may be 
affected even if the CGI program itself is not written in bash.

Florian Weimer / Red Hat Product Security

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