Security Bulletin
Summary
Six Bash vulnerabilities were disclosed in September 2014. This bulletin addresses the vulnerabilities that have been referred to as "Bash Bug" or "Shellshock" and two memory corruption vulnerabilities. Bash is used by the following products that IBM resells: QLogic 20-port 8Gb SAN Switch Module for IBM BladeCenter, QLogic 8 Gb Intelligent Pass-thru Module for IBM BladeCenter, and QLogic Virtual Fabric Extension Module for IBM BladeCenter.
Vulnerability Details
Abstract
Six Bash vulnerabilities were disclosed in September 2014. This bulletin addresses the vulnerabilities that have been referred to as "Bash Bug" or "Shellshock" and two memory corruption vulnerabilities. Bash is used by the following products that IBM resells: QLogic 20-port 8Gb SAN Switch Module for IBM BladeCenter, QLogic 8 Gb Intelligent Pass-thru Module for IBM BladeCenter, and QLogic Virtual Fabric Extension Module for IBM BladeCenter.
Content
Vulnerability Details:
CVE-ID: CVE-2014-6271
Description: GNU Bash could allow a remote attacker to execute arbitrary commands on the system, caused by an error when evaluating specially-crafted environment variables passed to it by the bash functionality. An attacker could exploit this vulnerability to write to files and execute arbitrary commands on the system.
CVSS Base Score: 10.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/96153
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVE-ID: CVE-2014-7169
Description: GNU Bash could allow a remote attacker to execute arbitrary commands on the system, caused by an incomplete fix related to malformed function definitions in the values of environment variables. An attacker could exploit this vulnerability using attack vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server to write to files and execute arbitrary commands on the system.
CVSS Base Score: 10.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/96209
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVE-ID: CVE-2014-7186
Description: GNU Bash could allow a remote attacker to execute arbitrary code on the system, caused by an out-of-bounds memory access while handling redir_stack. An attacker could exploit this vulnerability to execute arbitrary code on the system or cause a denial of service.
CVSS Base Score: 10
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/96237
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVE-ID: CVE-2014-7187
Description: GNU Bash could allow a remote attacker to execute arbitrary code on the system, caused by an off-by-one-error when handling deeply nested flow control constructs. An attacker could exploit this vulnerability to execute arbitrary code on the system or cause a denial of service.
CVSS Base Score: 10
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/96238
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVE-ID: CVE-2014-6277
Description: GNU Bash could allow a remote attacker to execute arbitrary code on the system, caused by an incomplete fix related to the failure to properly parse function definitions in the values of environment variables. An attacker could exploit this vulnerability using attack vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server to execute arbitrary code on the system or cause a denial of service.
CVSS Base Score: 10.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/96686
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVE-ID: CVE-2014-6278
Description: GNU Bash could allow a remote attacker to execute arbitrary code on the system, caused by an incomplete fix related to the parsing of user scripts. An attacker could exploit this vulnerability to execute arbitrary code on the system or cause a denial of service.
CVSS Base Score: 10.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/96687
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Affected products and versions
The following firmware versions are affected:
- QLogic 20-port 8Gb SAN Switch Module for IBM BladeCenter - versions 7.10.1.29 and before
- QLogic 8 Gb Intelligent Pass-thru Module for IBM BladeCenter - versions 7.10.1.29 and before
- QLogic Virtual Fabric Extension Module for IBM BladeCenter - versions 9.0.3.05.00 and before.
- IBM Flex System FC3171 8Gb SAN Switch and SAN Pass-thru - versions prior to 9.1.3.05.00
Remediation/Fixes:
IBM recommends updating affected products to the following firmware versions to remediate the vulnerabilities:
- IBM QLogic 20-port 8Gb SAN Switch Module for BladeCenter - version 7.10.1.31.00
- QLogic 8 Gb Intelligent Pass-thru Module for IBM BladeCenter - version 7.10.1.31.00
- QLogic Virtual Fabric Extension Module for IBM BladeCenter - version 9.0.3.10.00
- IBM Flex System FC3171 8Gb SAN Switch and SAN Pass-thru - version 9.1.3.05.00 or later
Workaround(s) & Mitigation(s):
Although IBM recommends that you update your firmware to the fixes identified above, you can mitigate, although not eliminate, your risk to these vulnerabilities by disabling web server access. This is done with the "set setup services" cli command and setting EmbeddedGUIEnabled to "False". This removes the web server as a potential attack mechanism for these six issues and limits potential exposure to the SSH and telnet services, which would require a potential attacker to authenticate with a username and password before attempting to exploit any of these vulnerabilities.
Note: This will disable access to the QuickTools GUI.
It is highly recommended that customers change the default admin password that is shipped from the factory.
References:
Related Information:
IBM
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IBM Product Security
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Acknowledgement
None
Change History
08 December 2014: Original Copy Published
10 December 2018: Add IBM Flex System FC3171 affected and fixed
versions.
* The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Flash.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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References
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
30 January 2019
UID
ibm1MIGR-5096676