Security Bulletin: A vulnerability has been identified in IBM Spectrum Scale where a local unprivileged user could cause a denial of service (CVE-2020-4491)

Summary

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

Vulnerability Details

CVEID:CVE-2020-4491
**DESCRIPTION:**IBM Spectrum Scale could allow a local attacker to cause a denial of service by sending a large number of RPC requests to the mmfsd daemon which would cause the service to crash.
CVSS Base score: 4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/181991 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM Spectrum Scale V5.0.0.0 through V5.0.5

IBM Spectrum Scale V4.2.0.0 through V4.2.3.22

Remediation/Fixes

For IBM Spectrum Scale V5.0.0.0 through 5.0.5, apply V5.0.5.1 available from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=5.0.5&platform=All&function=all

For IBM Spectrum Scale V4.2.0.0 thru V4.2.3.22, apply V4.2.3.23 available from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=4.2.3&platform=All&function=all

Workarounds and Mitigations

None