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AUSCERT External Security Bulletin Redistribution
ESB-2016.0016
sol20979231: Apache vulnerability CVE-2011-3639
5 January 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 ARX
Publisher: F5
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2011-3639
Reference: ASB-2011.0111
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/20/sol20979231.html
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sol20979231: Apache vulnerability CVE-2011-3639 Security AdvisorySecurity
Advisory
Original Publication Date: 12/29/2015
Vulnerability Description
The mod_proxy module in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x
before 2.2.18, when the Revision 1179239 patch is in place, does not properly
interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches
for configuration of a reverse proxy, which allows remote attackers to send
requests to intranet servers by using the HTTP/0.9 protocol with a malformed
URI containing an initial @ (at sign) character. NOTE: this vulnerability
exists because of an incomplete fix for CVE-2011-3368. (CVE-2011-3639) Impact
An attacker could make a reverse proxy connect to an arbitrary server that is
not directly accessible to the attacker by sending an HTTP version 0.9 request
to a vulnerable Apache HTTP server.
Security Issue Status
F5 Product Development has assigned ID 431234 (ARX) 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
ARX 6.0.0 - 6.4.0 None Low Management API (disabled by default)
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 for the ARX system, do not enable the API
functionality.
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
SOL10322: FirePass hotfix matrix
SOL12766: ARX hotfix matrix
SOL3430: Installing FirePass hotfixes
SOL6664: Obtaining and installing OPSWAT hotfixes
SOL10942: Installing OPSWAT hotfixes on BIG-IP APM systems
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