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AUSCERT External Security Bulletin Redistribution
ESB-2017.0825
K52180214: MCPD vulnerability CVE-2016-7474
28 March 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP Products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-7474
Original Bulletin:
https://support.f5.com/csp/article/K52180214
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K52180214: MCPD vulnerability CVE-2016-7474
Security Advisory
Original Publication Date: Mar 24, 2017
Updated Date: Mar 24, 2017
Security Advisory Description
In some cases the MCPD binary cache may allow a user with Advanced Shell
access, or privileges to generate a qkview, to temporarily obtain normally
unrecoverable information. (CVE-2016-7474)
Impact
A local user may have access to sensitive data such as passwords for
recently created local user accounts and passphrases that have been set
since the last reboot.
Security Advisory Status
F5 Product Development has assigned ID 601938 and 601927 (BIG-IP) to this
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 be vulnerable Versions known to be not vulnerable Severity Vulnerable component or feature
BIG-IP LTM 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
11.2.1 12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP AAM 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP AFM 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP Analytics 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
11.2.1 12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP APM 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
11.2.1 12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP ASM 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
11.2.1 12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP DNS 12.0.0 - 12.1.1 13.0.0 Medium MCPD
12.1.2
12.1.1 HF1
BIG-IP Edge Gateway 11.2.1 None Medium MCPD
BIG-IP GTM 11.4.0 - 11.6.1 11.6.1 HF1 Medium MCPD
11.2.1 11.5.4 HF3
BIG-IP Link Controller 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
11.2.1 12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP PEM 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.4.0 - 11.6.1 12.1.2
12.1.1 HF1
11.6.1 HF1
11.5.4 HF3
BIG-IP PSM 11.4.0 - 11.4.1 None Medium MCPD
BIG-IP WebAccelerator 11.2.1 None Medium MCPD
BIG-IP WebSafe 12.0.0 - 12.1.1 13.0.0 Medium MCPD
11.6.0 - 11.6.1 12.1.2
12.1.1 HF1
11.6.1 HF1
Security Advisory Recommended Actions
If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by upgrading to a version listed
in the Versions known to be not vulnerable column. If the table lists only
an older version than what you are currently running, or does not list a
non-vulnerable version, then no upgrade candidate currently exists.
To determine the necessary upgrade path for your BIG-IQ system, you should
understand the BIG-IQ product offering name changes. For more information,
refer to K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow
systems.
Mitigation
To partially mitigate this vulnerability, you can force the mcpd process
to reload the configuration. To force the mcpd process to reload the
configuration, refer to K13030: Forcing the mcpd process to reload the
BIG-IP configuration.
Impact of action: Forcing the mcpd process to reload the configuration
requires rebooting the BIG-IP system, which disrupts traffic processing
until the system is back up.
Acknowledgements
F5 would like to acknowledge Michael Molho of e-Xpert Solutions SA for
bringing this issue to our attention, and for following the highest
standards of responsible disclosure.
Supplemental Information
K9970: Subscribing to email notifications regarding F5 products
K9957: Creating a custom RSS feed to view new and updated documents
K4602: Overview of the F5 security vulnerability response policy
K4918: Overview of the F5 critical issue hotfix policy
K167: Downloading software and firmware from F5
K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
K9502: BIG-IP hotfix matrix
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