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AUSCERT External Security Bulletin Redistribution
ESB-2014.1671
sol15629: GNU Bash vulnerabilities CVE-2014-6271 and CVE-2014-7169
26 September 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-7169 CVE-2014-6271
Reference: ESB-2014.1670
ESB-2014.1669
ESB-2014.1668
ESB-2014.1660
ESB-2014.1659
ESB-2014.1657
Original Bulletin:
http://support.f5.com/kb/en-us/solutions/public/15000/600/sol15629.html
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sol15629: GNU Bash vulnerabilities CVE-2014-6271 and CVE-2014-7169
Security Advisory
Original Publication Date: 09/25/2014
Updated Date: 09/25/2014
Description
CVE-2014-6271
GNU Bash through 4.3 processes trailing strings after function definitions in
the values of environment variables, which allows remote attackers to execute
arbitrary code via a crafted environment, as demonstrated by vectors involving
the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in
the Apache HTTP Server, scripts executed by unspecified DHCP clients, and
other situations in which setting the environment occurs across a privilege
boundary from Bash execution.
CVE-2014-7169
GNU Bash through 4.3 bash43-025 processes trailing strings after certain
malformed function definitions in the values of environment variables, which
allows remote attackers to write to files or possibly have unknown other
impact via a crafted environment, as demonstrated by vectors involving the
ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the
Apache HTTP Server, scripts executed by unspecified DHCP clients, and other
situations in which setting the environment occurs across a privilege boundary
from Bash execution. NOTE: this vulnerability exists because of an incomplete
fix for CVE-2014-6271.
Impact
These vulnerabilities may allow authenticated users to gain knowledge of
sensitive information, manipulate certain data, or remotely execute code.
Status
F5 Product Development has assigned ID 480931 (BIG-IP) and ID 481070 (ARX) to
this vulnerability, and has evaluated the currently supported releases for
potential vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to Versions known to Vulnerable component
be vulnerable be not vulnerable or feature
BIG-IP LTM 11.0.0 - 11.6.0
10.0.0 - 10.2.4 None Bash shell
BIG-IP AAM 11.4.0 - 11.6.0 None Bash shell
BIG-IP AFM 11.3.0 - 11.6.0 None Bash shell
BIG-IP
Analytics 11.0.0 - 11.6.0 None Bash shell
BIG-IP APM 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Bash shell
BIG-IP ASM 11.0.0 - 11.6.0
10.0.0 - 10.2.4 None Bash shell
BIG-IP Edge
Gateway 11.0.0 - 11.3.0
10.1.0 - 10.2.4 None Bash shell
BIG-IP GTM 11.0.0 - 11.6.0
10.0.0 - 10.2.4 None Bash shell
BIG-IP Link
Controller 11.0.0 - 11.6.0
10.0.0 - 10.2.4 None Bash shell
BIG-IP PEM 11.3.0 - 11.6.0 None Bash shell
BIG-IP PSM 11.0.0 - 11.4.1
10.0.0 - 10.2.4 None Bash shell
BIG-IP
WebAccelerator 11.0.0 - 11.3.0
10.0.0 - 10.2.4 None Bash shell
BIG-IP WOM 11.0.0 - 11.3.0
10.0.0 - 10.2.4 None Bash shell
ARX 6.0.0 - 6.4.0 None Bash shell
Enterprise
Manager ** ** **
FirePass None 7.0.0
6.0.0 - 6.1.0 None
BIG-IQ Cloud ** ** **
BIG-IQ Device ** ** **
BIG-IQ Security ** ** **
LineRate None 2.4.0 - 2.4.1
2.3.0 - 2.3.1
2.2.0 - 2.2.4
1.6.0 - 1.6.3 None
**Confirmation of vulnerability or non-vulnerability is not presently
available. F5 is still researching the issue for the products indicated, and
will update this article as soon as the information has been confirmed.
Recommended action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the table does not list any version in the column, then no
upgrade candidate currently exists.
To mitigate this vulnerability, you should permit access to the BIG-IP
Configuration utility only over a secure network and limit login access to
trusted users. For additional information, refer to the links in the following
Supplemental Information section.
Supplemental Information
DevCentral: Shellshock mitigation with BIG-IP iRules
Note: A DevCentral login is required to access this content.
DevCentral: CVE-2014-6271 Shellshocked
Note: A DevCentral login is required to access this content.
DevCentral: Shellshock mitigation with LineRate Proxy
Note: A DevCentral login is required to access this content.
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents
SOL4602: Overview of the F5 security vulnerability response policy
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
SOL13309: Restricting access to the Configuration utility by source IP
address (11.x)
SOL7448: Restricting access to the Configuration utility by source IP
address (9.x - 10.x)
SOL13092: Overview of securing access to the BIG-IP system
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