Security Bulletin: A vulnerability has been identified in IBM Spectrum Scale where mmfsd daemon can be prevented from servicing requests (CVE-2020-4925)

Security Bulletin

Summary

A security vulnerability has been identified in all levels of IBM Spectrum Scale where mmfsd daemon can be prevented from servicing requests. A fix for this vulnerability is available

Vulnerability Details

CVEID: CVE-2020-4925
DESCRIPTION: A security vulnerability in the Spectrum Scale allows a non-root user to overflow the mmfsd daemon with requests and preventing the daemon to service other requests.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/191599 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

Affected Product(s)	Version(s)
IBM Spectrum Scale	ALL

Remediation/Fixes

For IBM Spectrum Scale levels lower than V5.1.1, apply V5.1.1 or later available (including 5.1.2 or later) from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=5.1.1&platform=All&function=all

In addition to applying the recommended code level, ensure that the sdrNotifyAuthEnabled configuration variable is set to ‘yes’, which requires a cluster minimum release level of 5.1.1 or later.

See <<mmchconfig command>> for more details - https://www.ibm.com/docs/en/spectrum-scale/5.1.1?topic=reference-mmchconfig-command

Note : Systems running supported version should be upgraded to the current release containing the security fixes.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

11 Feb 2022: Initial Publication

*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.

Document Location

Worldwide

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Tips

Security Bulletin: A vulnerability has been identified in IBM Spectrum Scale where mmfsd daemon can be prevented from servicing requests (CVE-2020-4925)