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             AUSCERT External Security Bulletin Redistribution

               sol38871451: TIFF vulnerability CVE-2015-7554
                              19 October 2016


        AusCERT Security Bulletin Summary

Product:           BIG-IP AAM
                   BIG-IP WebAccelerator
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Modify Arbitrary Files   -- Remote with User Interaction
                   Denial of Service        -- Remote with User Interaction
                   Access Confidential Data -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7554  

Reference:         ESB-2016.1873

Original Bulletin: 

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sol38871451: TIFF vulnerability CVE-2015-7554 

Security Advisory

Original Publication Date: 10/18/2016

Vulnerability Description

The _TIFFVGetField function in tif_dir.c in libtiff 4.0.6 allows attackers
to cause a denial of service (invalid memory write and crash) or possibly
have unspecified other impact via crafted field data in an extension tag
in a TIFF. (CVE-2015-7554)


This vulnerability allows unauthorized disclosure of information,
modification, and disruption of service.

Security Issue Status

F5 Product Development has assigned ID 623093 (BIG-IP), ID  622390 (BIG-IQ),
and ID 622393 (Enterprise Manager) 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 AAM	12.0.0 - 12.1.1				None					High		LibTIFF
		11.4.0 - 11.6.1	
BIG-IP 		11.2.1					10.2.1 - 10.2.4				High		LibTIFF

Vulnerability 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 SOL21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow


Disable image optimization for TIFF files using the AAM/WAM policy, or
ensure that TIFF files processed by BIG-IP AAM/WAM are not subject to
modification by attackers.

Impact of recommendation: Performing the recommended mitigation should
not have a negative impact on your system.

Supplemental Information

    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

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