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             AUSCERT External Security Bulletin Redistribution

               SOL17448: OpenSSH vulnerability CVE-2001-1473
                              19 October 2015


        AusCERT Security Bulletin Summary

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2001-1473  

Original Bulletin: 

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SOL17448: OpenSSH vulnerability CVE-2001-1473

Security Advisory

Original Publication Date: 10/16/2015

The SSH-1 protocol allows remote servers to conduct man-in-the-middle
attacks and replay a client challenge response to a target server by
creating a Session ID that matches the Session ID of the target, but which
uses a public key pair that is weaker than the target's public key, which
allows the attacker to compute the corresponding private key and use the
target's Session ID with the compromised key pair to masquerade as the

When SSH protocol version 1 is enabled on the SSHD service, it is possible
for a man-in-the-middle attack to perform replay attacks. All supported
releases of BIG-IP, BIG-IQ, and Enterprise Manager do not enable the use
of this protocol by default.


F5 Product Development has assigned ID 539794 (BIG-IP), ID 540040 (Enterprise
Manager) and ID 540039 (BIG-IQ) 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					Low		SSHD
		11.0.0 - 11.6.0
		10.1.0 - 10.2.4

BIG-IP AAM	12.0.0					None					Low		SSHD
		11.4.0 - 11.6.0

BIG-IP AFM	12.0.0					None					Low		SSHD
		11.3.0 - 11.6.0

BIG-IP	 	12.0.0					None					Low		SSHD
Analytics	11.0.0 - 11.6.0

BIG-IP APM	12.0.0					None					Low		SSHD
		11.0.0 - 11.6.0
		10.1.0 - 10.2.4

BIG-IP ASM	12.0.0					None					Low		SSHD
		11.0.0 - 11.6.0
		10.1.0 - 10.2.4

BIG-IP DNS	12.0.0					None					Low		SSHD

BIG-IP Edge	11.0.0 - 11.3.0				None					Low		SSHD
Gateway		10.1.0 - 10.2.4

BIG-IP GTM	11.0.0 - 11.6.0				None					Low		SSHD
		10.1.0 - 10.2.4	

BIG-IP Link	12.0.0					None					Low		SSHD
Controller	11.0.0 - 11.6.0
		10.1.0 - 10.2.4

BIG-IP PEM	12.0.0					None					Low		SSHD
		11.3.0 - 11.6.0

BIG-IP PSM	11.0.0 - 11.4.1				None					Low		SSHD
		10.1.0 - 10.2.4

BIG-IP 		11.0.0 - 11.3.0				None					Low		SSHD
WebAccelerator	10.1.0 - 10.2.4

BIG-IP WOM	11.0.0 - 11.3.0				None					Low		SSHD
		10.1.0 - 10.2.4

ARX		None					6.0.0 - 6.4.0				Not vulnerable	None

Enterprise 	3.0.0 - 3.1.1				None					Low		SSHD

FirePass	None					7.0.0					Not vulnerable	None
							6.0.0 - 6.1.0

BIG-IQ Cloud	4.0.0 - 4.5.0				None					Low		SSHD

BIG-IQ Device	4.2.0 - 4.5.0				None					Low		SSHD

BIG-IQ Security 4.0.0 - 4.5.0				None					Low		SSHD

BIG-IQ ADC	4.5.0					None					Low		SSHD

LineRate	None					2.5.0 - 2.6.1				Not vulnerable	None

F5 WebSafe	None					1.0.0					Not vulnerable	None

Traffix SDC	None					4.0.0 - 4.4.0				Not vulnerable	None
							3.3.2 - 3.5.1

Recommended Action

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 avoid this vulnerability, you should not use SSH protocol version 1
when establishing an SSH connecting to the SSHD service on the BIG-IP,
Enterprise Manager, or BIG-IQ system.

For the SSHD service on the BIG-IP, Enterprise Manager, or BIG-IQ system,
the SSHD configuration uses SSH protocol 2 by default. To avoid this
vulnerability, do not modify it to use SSH protocol version 1.

To verify the current SSH protocol enabled on your BIG-IP, Enterprise
Manager, or BIG-IQ system, type the following command:

grep ^Protocol /config/ssh/sshd_config

Command output for the system using only SSH protocol 2 appears similar
to the following example:
Protocol 2

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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