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Security Bulletin: Vulnerability in MD5 Signature and Hash Algorithm affects IBM Security Access Manager for Web (CVE-2015-7575)

Security Bulletin


The MD5 “SLOTH” vulnerability on TLS 1.2 affects IBM Security Access Manager for Web.

Vulnerability Details

CVEID: CVE-2015-7575
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 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 Web 7.0 appliances, all firmware versions
IBM Security Access Manager for Web 8.0 appliances, all firmware versions
IBM Security Access Manager 9.0 appliances, all firmware versions


The table below provides links to patches for all affected versions. Follow the installation instructions in the README file included with the patch.

IBM Security Access Manager for Web7.0 - (appliances)IV806801. Apply Interim Fix 21:
IBM Security Access Manager for Web8.0 -
1. For 8.0- environments, upgrade to
2. Apply Interim Fix 4:
IBM Security Access Manager9.0 -
1. For 9.0 environments, upgrade to
2. Apply Interim Fix 1:

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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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.


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.

[{"Product":{"code":"SSPREK","label":"Tivoli Access Manager for e-business"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Component":"--","Platform":[{"code":"PF004","label":"Appliance"}],"Version":"7.0;8.0;;;;8.0.1;;;9.0","Edition":"","Line of Business":{"code":"LOB24","label":"Security Software"}}]

Document Information

Modified date:
16 June 2018