Security Bulletin: A vulnerability has been identified in IBM Spectrum Scale where an unprivileged local user may cause a denial of service (CVE-2020-4756)

Security Bulletin

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-2020-4756
DESCRIPTION: IBM Spectrum Scale 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.
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

IBM Spectrum Scale V5.0.0.0 through V5.0.5.2

IBM Spectrum Scale V4.2.0.0 through V4.2.3.23

Remediation/Fixes

For IBM Spectrum Scale V5.0.0.0 through 5.0.5.2, apply V5.0.5.3 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 V4.2.3.23, apply V4.2.3.24 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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

12 Oct 2020: 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 an unprivileged local user may cause a denial of service (CVE-2020-4756)