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AUSCERT External Security Bulletin Redistribution
ESB-2016.2443
sol38871451: TIFF vulnerability CVE-2015-7554
19 October 2016
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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:
https://support.f5.com/kb/en-us/solutions/public/k/38/sol38871451.html
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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)
Impact
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
WebAccelerator
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
systems.
Mitigation
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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