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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1078
           Security Bulletin: Vulnerability in RC4 stream cipher
               affects Sterling Secure Proxy (CVE-2015-2808)
                               20 April 2015

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Sterling Secure Proxy
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2015-2808  

Reference:         ESB-2015.0962
                   ESB-2015.0961
                   ESB-2015.0960
                   ESB-2015.0958
                   ESB-2015.0956
                   ESB-2015.0955
                   ESB-2015.0954
                   ESB-2015.0953
                   ESB-2015.0950.2
                   ESB-2015.0949.2
                   ESB-2015.0948.2
                   ESB-2015.0947.2
                   ESB-2015.0946.2
                   ESB-2015.0944.2

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21882993

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Security Bulletin: Vulnerability in RC4 stream cipher affects Sterling Secure
Proxy (CVE-2015-2808)

Security Bulletin

Document information

More support for:

Sterling Secure Proxy

Software version:

3.3.1, 3.4, 3.4.1, 3.4.2

Operating system(s):

AIX, HP-UX, Linux, Solaris, Windows

Reference #:

1882993

Modified date:

2015-04-17

Summary

The RC4 Bar Mitzvah Attack for SSL/TLS affects IBM Sterling Secure Proxy.

Vulnerability Details

CVEID: CVE-2015-2808

DESCRIPTION: The RC4 algorithm, as used in the TLS protocol and SSL protocol,
could allow a remote attacker to obtain sensitive information. An attacker 
could exploit this vulnerability to remotely expose account credentials 
without requiring an active man-in-the-middle session. Successful exploitation
could allow an attacker to retrieve credit card data or other sensitive 
information. This vulnerability is commonly referred to as "Bar Mitzvah 
Attack".

CVSS Base Score: 5

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/101851 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Affected Products and Versions

Sterling Secure Proxy 3.4.2.0 through 3.4.2.0 iFix 1

Sterling Secure Proxy 3.4.1.0 through 3.4.1.8 iFix 6

Sterling Secure Proxy 3.4.0.0 through 3.4.0.4 iFix 6

Sterling Secure Proxy 3.3.1.0 through 3.3.1.23 iFix06

Remediation/Fixes

None

Workarounds and Mitigations

To disable the RC4 ciphers in Sterling Secure Proxy, do the following:

Bring up each Connect:Direct, FTP and HTTP netmap in the GUI configurator.

- - Edit each node in the netmap (inbound and outbound).

Navigate to the Security tab. Remove any ciphers which contain RC4 in
the name.

Click OK and go to the next node

- - When all the nodes in the netmap are complete, click Save

You should verify applying this configuration change does not cause any 
compatibility issues. Not disabling the RC4 stream cipher will expose yourself
to the attack described above. IBM recommends that you review your entire 
environment to identify other areas where you have enabled the RC4 stream 
cipher and take appropriate mitigation and remediation actions.

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support 
alerts like this.

References

Complete CVSS Guide

On-line Calculator V2

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Change History

17 April 2015: Original Version Published

*The CVSS Environment Score is customer environment specific and will 
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the 
Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the 
Common Vulnerability Scoring System (CVSS) is an "industry open standard 
designed to convey vulnerability severity and help to determine urgency and 
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY 
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT 
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

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