Security Bulletin
Summary
The MD5 “SLOTH” vulnerability on TLS 1.2 affects IBM Security Access Manager for Mobile.
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 Security Access Manager for Mobile 8.0 appliances, all firmware versions
IBM Security Access Manager 9.0 appliances, all firmware versions
Remediation/Fixes
The table below provides links to patches for all affected versions. Follow the installation instructions in the README file included with the patch.
| Product | VRMF | APAR | Remediation |
| IBM Security Access Manager for Mobile | 8.0 - 8.0.1.3 | IV80756 IV80758 | 1. For 8.0-8.0.1.2 environments, upgrade to 8.0.1.3: 8.0.1-ISS-ISAM-FP0003 2. Apply 8.0.1.3 Interim Fix 4: 8.0.1.3-ISS-ISAM-IF0004 |
| IBM Security Access Manager | 9.0 - 9.0.0.1 | IV80663 IV80676 | 1. For 9.0 environments, upgrade to 9.0.0.1: 9.0.0-ISS-ISAM-FP0001 2. Apply 9.0.0.1 Interim Fix 1: 9.0.0.1-ISS-ISAM-IF0001 |
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.
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References
Acknowledgement
Reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France
Change History
February 1, 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.
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Document Information
Modified date:
16 June 2018
UID
swg21974639