IBM Support

Security Bulletin:

Created by Mark Hack on
Published URL:
https://www.ibm.com/support/pages/node/690513
690513

Security Bulletin


Summary

The LogJam Attack on Diffie-Hellman ciphers (CVE-2015-4000) affects some versions of the DS8000.

Vulnerability Details

CVEID: CVE-2015-4000

DESCRIPTION: The TLS protocol could allow a remote attacker to obtain sensitive information, caused by the failure to properly convey a DHE_EXPORT ciphersuite choice. An attacker could exploit this vulnerability using man-in-the-middle techniques to force a downgrade to 512-bit export-grade cipher. Successful exploitation could allow an attacker to recover the session key as well as modify the contents of the traffic. This vulnerability is commonly referred to as "Logjam".

CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/103294 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

DS8870 prior to R7.2

DS8800/DS8700 prior to R6.3 SP9 ( 86.31.142.0 / 76.31.121.0 respectively) which have not applied ISO CD patch named RemoveWeakCertificatesv1.0 or RemoveWeakCertificatesV1.1

Remediation/Fixes

As noted DS8870 at R7.2 and above (87.21.5.0) and and DS8800/DS8700 at R6.3 SP9 and above (86.31.142.0 / 76.31.121.0) are not impacted.

DS8700/DS8800/DS8870 customers should upgrade to a version which is not impacted or apply the patch noted below.

Patch Release



ProductVRMFAPARRemediation/First Fix
DS8870 prior to R7.2N/ACVE_WEAK_CIPHER_PATCH_v1.003/23/2015
DS8800 prior to R6.3 SP9N/ACVE_WEAK_CIPHER_PATCH_v1.003/23/2015
DS8700 prior to R6.3 SP9N/ACVE_WEAK_CIPHER_PATCH_v1.003/23/2015

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References

Complete CVSS v2 Guide
On-line Calculator v2

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

*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:
24 May 2022

UID

ssg1S1005275

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