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AUSCERT External Security Bulletin Redistribution
ESB-2017.2458
K82455382: Apache Tomcat vulnerability CVE-2016-8745
29 September 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 ARX
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2016-8745
Reference: ESB-2017.1493
ESB-2017.1135
ESB-2017.0056
Original Bulletin:
https://support.f5.com/csp/article/K82455382
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K82455382: Apache Tomcat vulnerability CVE-2016-8745
Security Advisory
Original Publication Date: Sep 29, 2017
Applies to (see versions):
Security Advisory Description
A bug in the error handling of the send file code for the NIO HTTP connector
in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39,
7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object
being added to the Processor cache multiple times. This in turn meant that the
same Processor could be used for concurrent requests. Sharing a Processor can
result in information leakage between requests including, not not limited to,
session ID and the response body. The bug was first noticed in 8.5.x onwards
where it appears the refactoring of the Connector code for 8.5.x onwards made
it more likely that the bug was observed. Initially it was thought that the
8.5.x refactoring introduced the bug but further investigation has shown that
the bug is present in all currently supported Tomcat versions. (CVE-2016-8745)
Impact
This vulnerability can result in information leakage between requests,
including, but not limited to, the session ID and response body.
Security Advisory Status
F5 Product Development has assigned ID 466436 (ARX) 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:
+---------------+----------------+-----------------+----------+----------------+
| |Versions known |Versions known to| |Vulnerable |
|Product |to be vulnerable|be not vulnerable|Severity |component or |
| | | | |feature |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 | | |
|BIG-IP LTM |None |12.0.0 - 12.1.2 |Not |None |
| | |11.4.1 - 11.6.1 |vulnerable| |
| | |11.2.1 | | |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 |Not | |
|BIG-IP AAM |None |12.0.0 - 12.1.2 |vulnerable|None |
| | |11.4.1 - 11.6.1 | | |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 |Not | |
|BIG-IP AFM |None |12.0.0 - 12.1.2 |vulnerable|None |
| | |11.4.1 - 11.6.1 | | |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 | | |
|BIG-IP |None |12.0.0 - 12.1.2 |Not |None |
|Analytics | |11.4.1 - 11.6.1 |vulnerable| |
| | |11.2.1 | | |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 | | |
|BIG-IP APM |None |12.0.0 - 12.1.2 |Not |None |
| | |11.4.1 - 11.6.1 |vulnerable| |
| | |11.2.1 | | |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 | | |
|BIG-IP ASM |None |12.0.0 - 12.1.2 |Not |None |
| | |11.4.1 - 11.6.1 |vulnerable| |
| | |11.2.1 | | |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP DNS |None |13.0.0 |Not |None |
| | |12.0.0 - 12.1.2 |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP Edge |None |11.2.1 |Not |None |
|Gateway | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP GTM |None |11.4.1 - 11.6.1 |Not |None |
| | |11.2.1 |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 | | |
|BIG-IP Link |None |12.0.0 - 12.1.2 |Not |None |
|Controller | |11.4.1 - 11.6.1 |vulnerable| |
| | |11.2.1 | | |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 |Not | |
|BIG-IP PEM |None |12.0.0 - 12.1.2 |vulnerable|None |
| | |11.4.1 - 11.6.1 | | |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP PSM |None |11.4.1 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IP |None |11.2.1 |Not |None |
|WebAccelerator | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
| | |13.0.0 |Not | |
|BIG-IP WebSafe |None |12.0.0 - 12.1.2 |vulnerable|None |
| | |11.6.0 - 11.6.1 | | |
+---------------+----------------+-----------------+----------+----------------+
|ARX |6.2.0 - 6.4.0 |None |Low |ARX Manager GUI |
+---------------+----------------+-----------------+----------+----------------+
|Enterprise |None |3.1.1 |Not |None |
|Manager | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud |None |4.4.0 - 4.5.0 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Device |None |4.4.0 - 4.5.0 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Security|None |4.4.0 - 4.5.0 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ ADC |None |4.5.0 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ | |5.0.0 - 5.3.0 |Not | |
|Centralized |None |4.6.0 |vulnerable|None |
|Management | | | | |
+---------------+----------------+-----------------+----------+----------------+
|BIG-IQ Cloud | | |Not | |
|and |None |1.0.0 |vulnerable|None |
|Orchestration | | | | |
+---------------+----------------+-----------------+----------+----------------+
|F5 iWorkflow |None |2.0.0 - 2.3.0 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|LineRate |None |2.5.0 - 2.6.2 |Not |None |
| | | |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
|Traffix SDC |None |5.0.0 - 5.1.0 |Not |None |
| | |4.0.0 - 4.4.0 |vulnerable| |
+---------------+----------------+-----------------+----------+----------------+
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.
Mitigation
To mitigate this vulnerability, you can limit access to the ARX Manager GUI IP
address and port to trusted users and/or use the command line interface
instead of the ARX Manager GUI.
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
K12766: ARX hotfix matrix
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