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AUSCERT External Security Bulletin Redistribution
ESB-2015.1811
SOL16938: OpenSSL vulnerability CVE-2015-1788
9 July 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-1788
Reference: ASB-2015.0065
ESB-2015.1809
ESB-2015.1699
ESB-2015.1670
ESB-2015.1569
ESB-2015.1557
ESB-2015.1540
ESB-2015.1544.2
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/16000/900/sol16938.html
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SOL16938: OpenSSL vulnerability CVE-2015-1788
Security Advisory
Original Publication Date: 07/08/2015
Description
The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s,
1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not
properly handle ECParameters structures in which the curve is over a malformed
binary polynomial field, which allows remote attackers to cause a denial of
service (infinite loop) via a session that uses an Elliptic Curve algorithm,
as demonstrated by an attack against a server that supports client
authentication. (CVE-2015-1788)
Impact
Remote attackers may be able to cause a denial-of-service (DoS) by way of a
session that uses an Elliptic Curve algorithm against a server that supports
client authentication.
Status
F5 Product Development has assigned ID 527630 (BIG-IP and BIG-IQ), ID 531974
(Enterprise Manager), and ID 410742 (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
BIG-IP LTM 11.0.0 - 11.6.0 None Severe Data plane:
10.1.0 - 10.2.4 Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP AAM 11.4.0 - 11.6.0 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP AFM 11.3.0 - 11.6.0 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP 11.0.0 - 11.6.0 None Severe Control plane:
Analytics Apache: Only when configured for client authentication*
BIG-IP APM 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP ASM 11.0.0 - 11.6.0
10.0.0 - 10.2.4 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP Edge 11.0.0 - 11.3.0
Gateway 10.1.0 - 10.2.4 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP GTM 11.0.0 - 11.6.0
10.0.0 - 10.2.4 None Severe Control plane:
Apache: Only when configured for client authentication*
11.5.0 - 11.6.0 11.2.0 - 11.4.0 Control plane:
11.1.0 10.1.0 - 10.2.4 Low gtmd: When acting as a client to peer systems
big3d: When acting as a server to peer systems
BIG-IP Link 11.0.0 - 11.6.0 None Severe Control plane:
Controller 10.0.0 - 10.2.4 Apache: Only when configured for client authentication*
BIG-IP PEM 11.3.0 - 11.6.0 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP PSM 11.0.0 - 11.4.1
10.0.0 - 10.2.4 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP 11.0.0 - 11.3.0 None Severe Data plane:
WebAccelerator 10.0.0 - 10.2.4 Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
BIG-IP WOM 11.0.0 - 11.3.0
10.0.0 - 10.2.4 None Severe Data plane:
Client SSL profile: Client Authentication set to 'Require' or 'Request'**
Server SSL profile: Default configuration and SSL Forward Proxy configuration
Control plane:
Apache: Only when configured for client authentication*
ARX 6.0.0 - 6.4.0 None Medium GUI
Enterprise 3.0.0 - 3.1.1
Manager 2.1.0 - 2.3.0 None Severe OpenSSL
FirePass None 7.0.0
6.0.0 - 6.1.0 Not vulnerable None
BIG-IQ Cloud 4.0.0 - 4.5.0 None Severe OpenSSL
BIG-IQ Device 4.2.0 - 4.5.0 None Severe OpenSSL
BIG-IQ Security 4.0.0 - 4.5.0 None Severe OpenSSL
BIG-IQ ADC 4.5.0 None Severe OpenSSL
LineRate None 2.5.0 - 2.6.0 Not vulnerable None
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC None 4.0.0 - 4.1.0
3.3.2 - 3.5.1 Not vulnerable None
*Apache is not configured to support client authentication, by default, on the
BIG-IP system.
**The Client Authentication setting of "ignore" does not expose the
vulnerability.
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 for the BIG-IP system, you should be aware of
the following:
To mitigate this vulnerability, you should only permit management access to F5
products over a secure network and restrict command line access for affected
systems to the trusted users. For more information, refer to SOL13309:
Restricting access to the Configuration utility by source IP address (11.x)
and SOL13092: Overview of securing access to the BIG-IP system.
Do not configure Apache to support client authentication on the BIG-IP 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)
SOL10025: Managing BIG-IP product hotfixes (10.x)
SOL9502: BIG-IP hotfix matrix
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