SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Device (Embedded Server/Appliance)  >   Cisco Unified Computing System Vendors:   Cisco
(Cisco Issues Advisory for Cisco Unified Computing System) GNU bash Environment Variable Processing Flaw Lets Users Execute Arbitrary Code
SecurityTracker Alert ID:  1030918
SecurityTracker URL:  http://securitytracker.com/id/1030918
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:  Sep 26 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:   A vulnerability was reported in GNU bash. A user can execute arbitrary code on the target system. Cisco Unified Computing System is affected. The impact may vary.

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:   Cisco has issued an advisory for Cisco Unified Computing System.

Cisco has assigned bug ID CSCur01379 to this vulnerability.

The Cisco advisory is available at:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash

Vendor URL:  www.gnu.org/software/bash/ (Links to External Site)
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



 Source Message Contents



[Original Message Not Available for Viewing]


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2019, SecurityGlobal.net LLC