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-2016.0518 - [Win][OSX] IBM Client Application Access: Access privileged data - Remote with user interaction

Date: 29 February 2016
References: ASB-2016.0004  ESB-2016.0495  ESB-2016.0497  ESB-2016.0498  ESB-2016.0499  ESB-2016.0507  ESB-2016.0508  ESB-2016.0509  ESB-2016.0519  ESB-2016.0521  
ESB-2016.0522  ESB-2016.0523  ESB-2016.0525  ESB-2016.0538  ESB-2016.0539  ESB-2016.0542  ESB-2016.0550  

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

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

                               ESB-2016.0518
   Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm
           affects IBM Client Application Access (CVE-2015-7575)
                             29 February 2016

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

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

Product:           IBM Client Application Access
Publisher:         IBM
Operating System:  OS X
                   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-2016.0509
                   ESB-2016.0508
                   ESB-2016.0507
                   ESB-2016.0499
                   ESB-2016.0498
                   ESB-2016.0497
                   ESB-2016.0495

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21977618

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

Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm affects 
IBM Client Application Access (CVE-2015-7575)

Document information

More support for:

IBM Notes

Security

Software version:

9.0.1.5

Operating system(s):

OS X, Windows

Reference #:

1977618

Modified date:

2016-02-26

Security Bulletin

Summary

The MD5 SLOTH vulnerability on TLS 1.2 affects IBM Client Application Access.

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.

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/S:U/C:H/I:L/A:N)

Affected Products and Versions

IBM Client Application Access 1.0.0.1

Remediation/Fixes

The IBM Client Application Access (ICAA) SLOTH vulnerability is tracked as SPR
KLYHA5YRVP and a fix is introduced in ICAA 1.0.0.1 Interim Fix 1. You can 
download the Interim Fix from the ICAA tab of the following technote: 
http://www.ibm.com/support/docview.wss?uid=swg21657963

Note: You should verify applying this fix does not cause any compatibility 
issues. The fix disables MD5 signature hash by default. If you change the 
default setting after applying the fix, you 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 MD5 signature hash 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 v3 Guide

On-line Calculator v3

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Note: This technote applies only to IBM Client Application Access.

Acknowledgement

Reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France

*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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=hHHh
-----END PGP SIGNATURE-----