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AUSCERT External Security Bulletin Redistribution
ESB-2016.1043
sol93532943: SSHD session.c vulnerability CVE-2016-3115
29 April 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP
F5 BIG-IQ
F5 Enterprise Manager
F5 Traffix SDC
Publisher: F5 Networks
Operating System: Network Appliance
Virtualisation
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3115
Reference: ESB-2016.0670.2
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/93/sol93532943.html
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sol93532943: SSHD session.c vulnerability CVE-2016-3115
Security Advisory
Original Publication Date: 04/27/2016
Vulnerability Description
Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before
7.2p2 allow remote authenticated users to bypass intended shell-command
restrictions via crafted X11 forwarding data, related to the (1)
do_authenticated1 and (2) session_x11_req functions. (CVE-2016-3115)
Impact
Remote users may have the ability to read arbitrary files by using the
authenticated user's privilege.
Security Issue Status
F5 Product Development has assigned ID 583678 (BIG-IP), ID 584222 (Enterprise
Manager), ID 584220 (BIG-IQ), INSTALLER-2306 (Traffix SDC), and LRS-60665
(LineRate) to this vulnerability, and has evaluated the currently supported
releases for potential 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 None Medium OpenSSH *
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP AAM 12.0.0 None Medium OpenSSH *
11.4.0 - 11.6.0
BIG-IP AFM 12.0.0 None Medium OpenSSH *
11.3.0 - 11.6.0
BIG-IP Analytics 12.0.0 None Medium OpenSSH *
11.0.0 - 11.6.0
BIG-IP APM 12.0.0 None Medium OpenSSH *
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP ASM 12.0.0 None Medium OpenSSH *
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP DNS 12.0.0 None Medium OpenSSH *
BIG-IP Edge Gateway 11.0.0 - 11.3.0 None Medium OpenSSH *
10.1.0 - 10.2.4
BIG-IP GTM 11.0.0 - 11.6.0 None Medium OpenSSH *
10.1.0 - 10.2.4
BIG-IP Link Controller 12.0.0 None Medium OpenSSH *
11.0.0 - 11.6.0
10.1.0 - 10.2.4
BIG-IP PEM 12.0.0 None Medium OpenSSH *
11.3.0 - 11.6.0
BIG-IP PSM 11.0.0 - 11.4.1 None Medium OpenSSH *
10.1.0 - 10.2.4
BIG-IP WebAccelerator 11.0.0 - 11.3.0 None Medium OpenSSH *
10.1.0 - 10.2.4
BIG-IP WOM 11.0.0 - 11.3.0 None Medium OpenSSH *
10.1.0 - 10.2.4
ARX None 6.0.0 - 6.4.0 Not vulnerable None
Enterprise Manager 3.0.0 - 3.1.1 None Medium OpenSSH *
FirePass None 7.0.0 Not vulnerable None
6.0.0 - 6.1.0
BIG-IQ Cloud 4.0.0 - 4.5.0 None Medium OpenSSH *
BIG-IQ Device 4.2.0 - 4.5.0 None Medium OpenSSH *
BIG-IQ Security 4.0.0 - 4.5.0 None Medium OpenSSH *
BIG-IQ ADC 4.5.0 None Medium OpenSSH *
BIG-IQ Centralized Management 4.6.0 None Medium OpenSSH *
BIG-IQ Cloud and Orchestration 1.0.0 None Medium OpenSSH *
LineRate 2.5.0 - 2.6.1 None Low OpenSSH
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC 4.0.0 - 4.4.0 None Low OpenSSH
3.3.2 - 3.5.1
* The affected versions ship with vulnerable code, but do not enable the code
by default. The X11Forwarding option is not enabled unless explicitly enabled
by an administrator.
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.
F5 responds to vulnerabilities in accordance with the Severity values
published in the previous table. The Severity values and other security
vulnerability parameters are defined in SOL4602: Overview of the F5 security
vulnerability response policy.
To mitigate this vulnerability, you can ensure that the X11Forwarding option
is absent, commented out, or set to "no" in the sshd_config configuration
file. Additionally you may restrict remote access to the sshd TCP port 22 to
trusted networks only.
Impact of action: Performing the suggested mitigations 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
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
SOL13123: Managing BIG-IP product hotfixes (11.x - 12.x)
SOL10025: Managing BIG-IP product hotfixes (10.x)
SOL9502: BIG-IP hotfix matrix
SOL15106: Managing BIG-IQ product hotfixes
SOL15113: BIG-IQ hotfix matrix
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