Security Bulletin
Summary
The MD5 “SLOTH” vulnerability on TLS 1.2 affects IBM® FlashSystem™ V840.
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
FlashSystem V840 including machine type and models (MTMs) for all available code levels. MTMs affected include 9846-AE1, 9848-AE1, 9846-AC0, 9848-AC0, 9846-AC1, and 9848-AC1.
All V840 storage nodes (MTMs ending in –AE1) are affected when running code levels before 1.1.3.8. Code levels starting 1.2, 1.3, and 1.4 are not affected.
All V840 controller nodes (MTMs ending in –AC0 or –AC1) are affected when running code levels before 7.3.0.10. Code levels starting 7.4, 7.5, and 7.6 are not affected.
Remediation/Fixes
If the code level you are running is affected, IBM recommends that you fix this vulnerability by upgrading the V840 nodes to the following code levels or higher:
| V840 MTMs | VRMF | APAR | Remediation/First Fix |
| Storage nodes: 9846-AE1 & 9848-AE1 Control nodes: 9846-AC0, 9846-AC1, 9848-AC0 & 9848-AC1 | Code fixes are now available: Storage Node VRMF . 1.4 stream: 1.4.0.7 (or later) 1.3 stream: 1.3.0.2 (or later) 1.2 stream: 1.2.1.7 (or later) 1.1 stream: 1.1.3.8 (or later) Controller Node VRMF . 7.6 stream: 7.6.0.1 (or later) 7.5 stream: 7.5.0.2 (or later) | N/A | No workarounds or mitigations, other than applying this code fix, are known for this vulnerability |
FlashSystem V840 fixes for storage and controller node are available @ IBM’s Fix Central
Workarounds and Mitigations
None
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References
Acknowledgement
None
Change History
14 January 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:
17 June 2018
UID
ssg1S1005584