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             AUSCERT External Security Bulletin Redistribution

           sol16861: BIG-IQ remote authentication vulnerability
                      CVE-2015-4637 Security Advisory
                                7 July 2015


        AusCERT Security Bulletin Summary

Product:           F5 BIG-IQ products
Publisher:         F5
Operating System:  Network Appliance
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-4637  

Original Bulletin: 

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sol16861: BIG-IQ remote authentication vulnerability CVE-2015-4637 Security

Security Advisory

Original Publication Date: 07/06/2015


When remote authentication is configured on the BIG-IQ system for a LDAP
server that allows anonymous BIND operations, a unauthenticated user may
obtain an authentication token from the REST API for any known (or guessed)
LDAP user account and will receive all the access and privileges of that
user account for REST API calls. (CVE-2015-4637)


An attacker may be able to obtain an authentication token from the
representational state transfer (REST) application programming interface
(API) for known, or guessed, Lightweight Directory Access Protocol (LDAP)
user accounts.


F5 Product Development has assigned ID 527647 (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		Versions known to	Severity	Vulnerable component or feature
		to be vulnerable	be not vulnerable

BIG-IQ Cloud	4.4.0 - 4.5.0		4.5.0 HF2		Critical	REST API
					4.4.0 HF2
					4.0.0 - 4.3.0

BIG-IQ Device	4.4.0 - 4.5.0		4.5.0 HF2		Critical	REST API
					4.4.0 HF2
					4.2.0 - 4.3.0

BIG-IQ Security 4.4.0 - 4.5.0		4.5.0 HF2		Critical	REST API
					4.4.0 HF2
					4.0.0 - 4.3.0

BIG-IQ ADC	4.5.0			4.5.0 HF2		Critical	REST API

Note: As of February 17, 2015, AskF5 Security Advisory articles include
the Severity value. Security Advisory articles published before this date
do not list a Severity value.

Recommended Action

If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to
the listed version. If the listed version is older than the version you
are currently running, or if the table does not list any version in the
column, 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 disable LDAP remote authentication
on the BIG-IQ system, or disable anonymous binding for the LDAP server.

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)

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