Security Bulletin
Summary
There is a vulnerability in IBM® SDK Java™ Technology Edition, Version 8 that is used by IBM Support Assistant Team Server. This vulnerability, commonly referred to as “SLOTH”, was disclosed as part of the IBM Java SDK updates in January 2016.
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. This vulnerability is commonly referred to as “SLOTH”.
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/UI:U/C:H/I:L/A:N)
Affected Products and Versions
IBM Java SDK shipped with IBM Support Assistant Team Server versions 5.0.0, 5.0.1.0, 5.0.1.1, 5.0.2.0, and 5.0.2.1
Remediation/Fixes
Workarounds and Mitigations
You can address this issue by manually updating the java.security file under your ISA installation to add MD5 and MD5withRSA as noted below:
1. Open a command prompt, then change directory to the <isa_install>/ISA5/_jvm/jre/lib/security directory.
2. Open the java.security file with a text editor
3. Add the following properties:
jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize <768, MD5withRSA
jdk.certpath.disabledAlgorithms=MD2, RSA keySize <1024, MD5
Get Notified about Future Security Bulletins
References
Change History
10 February 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:
15 June 2018
UID
swg21976506