Security Bulletin: A vulnerability in IBM Spectrum Scale packaged in IBM Elastic Storage Server could cause a denial of service (CVE-2020-4756)

Summary

A security vulnerability has been identified in all levels of IBM Elastic Storage Server that could allow a local attacker to cause a denial of service. A fix for this vulnerability is available.

Vulnerability Details

CVEID:CVE-2020-4756
**DESCRIPTION:**IBM Spectrum Scale V4.2.0.0 through V4.2.3.23 and V5.0.0.0 through V5.0.5.2 as well as IBM Elastic Storage System 6.0.0 through 6.0.1.0 could allow a local attacker to invoke a subset of ioctls on the device with invalid arguments that could crash the kernel and cause a denial of service. IBM X-Force ID: 188599.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/188599 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

ESS 5.3.0 through ESS 5.3.6
ESS 5.0.0 through ESS 5.2.10

Remediation/Fixes

For IBM Elastic Storage Server V5.3.0 through 5.3.6, apply V5.3.6.1 or later available from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=5.3.0&platform=All&function=all

For IBM Elastic Storage Server V5.0.0 through V5.2.10, apply V5.2.11 or later available from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=5.2.0&platform=All&function=all

Workarounds and Mitigations

None