copyright | disclaimer | privacy | contact  
Australia's Leading Computer Emergency Response Team
 
Search this site

 
On this site

 > HOME
 > About AusCERT
 > Membership
 > Contact Us
 > PKI Services
 > Publications
 > Sec. Bulletins
 > Conferences
 > News & Media
 > Services
 > Web Log
 > Site Map
 > Site Help
 > Member login





 

ESB-2016.0542 - [Win][RedHat][AIX] IBM OS Images: Access privileged data - Remote with user interaction

Date: 01 March 2016
References: ASB-2016.0004  ESB-2016.0518  ESB-2016.0519  ESB-2016.0521  ESB-2016.0522  ESB-2016.0523  ESB-2016.0538  ESB-2016.0539  ESB-2016.0547  ESB-2016.0550  
ESB-2016.0551  ESB-2016.0556  ESB-2016.0570  

Click here for printable version
Click here for PGP verifiable version
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0542
 Security Bulletin: A vulnerability in IBM Java SDK affects IBM OS Images
       for Red Hat Linux Systems, AIX, and Windows. (CVE-2015-7575)
                               1 March 2016

===========================================================================

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

Product:           IBM OS Images
Publisher:         IBM
Operating System:  AIX
                   Red Hat
                   Windows
Impact/Access:     Access Privileged Data         -- Remote with User Interaction
                   Provide Misleading Information -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7575  

Reference:         ASB-2016.0004
                   ESB-2016.0539
                   ESB-2016.0538
                   ESB-2016.0523
                   ESB-2016.0522
                   ESB-2016.0521
                   ESB-2016.0519
                   ESB-2016.0518

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21977880

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: A vulnerability in IBM Java SDK affects IBM OS Images for 
Red Hat Linux Systems, AIX, and Windows. (CVE-2015-7575)

Document information

More support for:

PureApplication System

Software version:

2.0, 2.0.0.1, 2.1.0.0, 2.1.0.1, 2.1.0.2, 2.1.1.0, 2.1.2.0

Operating system(s):

AIX, Linux, Windows

Reference #:

1977880

Modified date:

2016-02-29

Security Bulletin

Summary

There is a vulnerability in IBM SDK Java Technology Edition, Version 6 and 7,
that is used by IBM OS Images for Red Hat Linux Systems, IBM OS Images for 
AIX, and Windows. The issue was disclosed as part of the IBM Java SDK updates
in January 2016 and this vulnerability is commonly referred to as SLOTH.

Vulnerability Details

CVEID: CVE-2015-7575

DESCRIPTION: The TLS protocol could allow weaker than expected security caused
by a collision attack when using the MD5 hash function for signing a 
ServerKeyExchange message during a TLS handshake. An attacker could exploit 
this vulnerability using man-in-the-middle techniques to impersonate a TLS 
server and obtain credentials. This vulnerability is commonly referred to as 
SLOTH.

CVSS Base Score: 7.1

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/109415 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/UI:U/C:H/I:L/A:N)

Affected Products and Versions

IBM OS Image for Red Hat Linux Systems 3.0.0.0 and earlier.

IBM OS Image for AIX Systems 2.1.1.0 and earlier.

Remediation/Fixes

Virtual machines deployed from IBM PureApplication Systems are affected. This
includes RedHat Linux, AIX-based, and Windows-based deployments. The solution
is to apply the following IBM PureApplication System fix to the deployed 
virtual machines.

Java Update for Windows

http://www-933.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=Java_Update_Windows_Feb_2016

Java Update for Linux

http://www-933.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=Java_Update_Linux_Feb_2016

Java Update for AIX

http://www-933.ibm.com/support/fixcentral/swg/doSelectFixes?options.selectedFixes=Java_Update_AIX_Feb_2016

1. Import the fix into the Emergency Fix catalogue.

2. For deployed instances, apply this emergency fix on the VM.

3. Restart the deployed instance after the fix is applied.

Workarounds and Mitigations

For CVE-2015-7575:

Users of Java 7 and later can address the issue by updating the 
/jre/lib/security/java.security file as follows (both steps are required):

 Add MD5 to the jdk.certpath.disabledAlgorithms property - e.g. 
jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024, MD5

 Add MD5withRSA to the jdk.tls.disabledAlgorithms property - e.g. 
jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768, MD5withRSA

Java 6 requires code changes in the JSSE component in addition to the 
java.security file modifications, so upgrading the JDK is the only solution.

Get Notified about Future Security Bulletins

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

References

Complete CVSS v3 Guide

On-line Calculator v3

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

CVE-2015-7575 was reported to IBM by Karthikeyan Bhargavan at INRIA in Paris,
France

Change History

26 February 2016: 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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=j8xj
-----END PGP SIGNATURE-----