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AUSCERT External Security Bulletin Redistribution
ESB-2015.2632
SOL17448: OpenSSH vulnerability CVE-2001-1473
19 October 2015
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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:
https://support.f5.com/kb/en-us/solutions/public/17000/400/sol17448.html
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SOL17448: OpenSSH vulnerability CVE-2001-1473
Security Advisory
Original Publication Date: 10/16/2015
Description
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
target.(CVE-2001-1473)
Impact
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.
Status
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
Manager
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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