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Category:   Application (Security)  >   McAfee SaaS Vendors:   McAfee
(McAfee Issues Advisory for McAfee SaaS) GNU bash Environment Variable Processing Flaws Let Users Execute Arbitrary Code
SecurityTracker Alert ID:  1030992
SecurityTracker URL:  http://securitytracker.com/id/1030992
CVE Reference:   CVE-2014-6271, CVE-2014-6277, CVE-2014-6278, CVE-2014-7169, CVE-2014-7186, CVE-2014-7187   (Links to External Site)
Date:  Oct 9 2014
Impact:   Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via local system, User access via network
Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   Several vulnerabilities were reported in GNU bash. A user can execute arbitrary code on the target system. McAfee SaaS is affected.

The software does not properly process environment variables.

A user can supply a specially crafted value that includes a bash function followed by additional code that, when processed by bash, will execute the additional code [CVE-2014-6271]. This vulnerability is known as "Shellshock".

Stephane Chazelas reported this vulnerability.

An initial fix for CVE-2014-6271 did not properly fix this flaw [CVE-2014-7169].

A user can supply a specially crafted value to trigger an out-of-bounds memory access in redir_stack() and potentially execute arbitrary code [CVE-2014-7186].

Florian Weimer of Red Hat Product Security reported this vulnerability.

A user can supply specially crafted, deeply nested flow control constructs to trigger an off-by-one error and potentially execute arbitrary code [CVE-2014-7187].

Florian Weimer of Red Hat Product Security reported this vulnerability.

A user can supply specially crafted data to access uninitialized memory and overwrite a pointer to potentially execute arbitrary code [CVE-2014-6277].

A user can supply specially crafted data to execute arbitrary code [CVE-2014-6278].

Michal Zalewski reported these vulnerabilities.

On a system with an application that passes data from a remote or remote authenticated user to bash, a remote or remote authenticated user may be able to exploit these vulnerabilities to execute arbitrary code.

Some common system application configurations are affected.

Demonstration exploit code is available.

This vulnerability is being actively exploited.

Impact:   A user can execute arbitrary code on the target system. In some application configurations, a remote user may be able to exploit this.
Solution:   McAfee has issued an advisory for McAfee SaaS. McAfee SaaS Account Management (SAM), SaaS Email Archiving, SaaS Email Protection and Continuity, and SaaS Web Protection are affected.

The vendor indicates that these products are vulnerable but have minimal or no exposure given standard deployment best practices.

The McAfee advisory is available at:

https://kc.mcafee.com/corporate/index?page=content&id=SB10085

Cause:   Input validation error

Message History:   This archive entry is a follow-up to the message listed below.
Sep 24 2014 GNU bash Environment Variable Processing Flaws Let Users Execute Arbitrary Code



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