IBM Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm affects WebSphere Message Broker and IBM Integration Bus (CVE-2015-7575) - United States WMB IIB SECURITY BULLETIN

SUMMARY
 The MD5 “SLOTH” vulnerability on TLS 1.2 affects WebSphere Message Broker and IBM Integration Bus 

VULNERABILITY DETAILS
CVEID: CVE-2015-7575 [http://cve.mitre.org/cgi-bin/cvename.cgi?name=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 [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 Integration Bus V9, V10 

WebSphere Message Broker V8

REMEDIATION/FIXES
For users of ODBC SSL using the DataDirect drivers:

You might be vulnerable to SLOTH vulnerability, if you have not applied APAR IT09602 released in August 2015. (Please refer the bulletin at 
http://www.ibm.com/support/docview.wss?uid=swg21958955 [http://www.ibm.com/support/docview.wss?uid=swg21958955] for more details)



Product VRMF APAR Remediation/Fix IBM Integration Bus V10 IT09602 The APAR is available in fix pack 10.0.0.2 and above. IBM Integration Bus V9 IT09602 The APAR is available in fix pack 9.0.0.5 and above. WebSphere Message Broker 

V8
IT09602 An interim fix is available from IBM Fix Central for all platforms.
http://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&product=ibm/WebSphere/WebSphere+Message+Broker&release=All&platform=All&function=aparId&apars=IT09602 [http://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&product=ibm/WebSphere/WebSphere+Message+Broker&release=All&platform=All&function=aparId&apars=IT09602]

The APAR is targeted to be available in fix pack 8.0.0.7. For unsupported versions of the product, IBM recommends upgrading to a fixed, supported version/release/platform of the product.  

You should verify thst applying this fix does not cause any compatibility issues. The fix prevents the currently-practical SLOTH attack against the RSA-MD5 client authentication. IBM recommends that you avoid using ciphers which use an MD5 or SHA-1 signature hash. 

The planned maintenance release dates for WebSphere Message Broker and IBM Integration Bus are available at : 
http://www.ibm.com/support/docview.wss?uid=swg27006308 [http://www.ibm.com/support/docview.wss?uid=swg27006308]

WORKAROUNDS AND MITIGATIONS
None

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IMPORTANT NOTE
 IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site [http://www.ibm.com/systems/z/solutions/security_subintegrity.html]. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk. 

REFERENCES
Complete CVSS v3 Guide [http://www.first.org/cvss/user-guide] 
On-line Calculator v3 [http://www.first.org/cvss/calculator/3.0] RELATED INFORMATION
IBM Secure Engineering Web Portal [http://www.ibm.com/security/secure-engineering/bulletins.html] 
IBM Product Security Incident Response Blog [http://www.ibm.com/blogs/PSIRT] ACKNOWLEDGEMENT
Reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France 

CHANGE HISTORY
 23 Jan 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.

RELATED INFORMATION
 A Japanese translation is available [http://www.ibm.com/support/docview.wss?uid=swg21977747]


 



Cross reference information Segment Product Component Platform Version Edition Business Integration IBM Integration Bus Not Applicable AIX, HP-UX, Linux, Solaris, Windows 10.0, 9.0 
PRODUCT ALIAS/SYNONYM
 WMB IIB

Question: Help with Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm affects WMB & IIB (CVE-2015-7575) I need to understand details regarding Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm affects WebSphere Message Broker and IBM Integration Bus (CVE-2015-7575). Where can I find this information? 

Answer: CVEID: CVE-2015-7575 [http://cve.mitre.org/cgi-bin/cvename.cgi?name=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 [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)