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
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 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 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 The APAR is targeted to be available in fix pack 8.0.0.7. |
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
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. 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
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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Product Synonym
WMB IIB
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Document Information
Modified date:
23 March 2020
UID
swg21975233