Security Bulletin: Linux Kernel vulnerability may affect IBM Elastic Storage System (CVE-2021-4203)

Security Bulletin

Summary

There is a vulnerability in Linux kernel, used by IBM Elastic Storage System, which could allow a denial of service.

Vulnerability Details

CVEID: CVE-2021-4203
DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a use-after-free read flaw in the sock_getsockopt() function in net/core/sock.c. By sending a specially-crafted request, a local authenticated attacker could exploit this vulnerability to crash the system or obtain internal kernel information.
CVSS Base score: 7.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/222609 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM Elastic Storage System	6.1.0.0 - 6.1.2.3
IBM Elastic Storage System	6.1.3.0 - 6.1.3.1

Remediation/Fixes

IBM recommends that you fix this vulnerability by upgrading affected versions of IBM Elastic Storage System 3000, 3200, 3500 and 5000 to the following code levels or higher:

V6.1.4.0 or later

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=6.1.4&platform=All&function=all

V6.1.2.4 or later

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Elastic+Storage+Server+(ESS)&release=6.1.0&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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Change History

25 Aug 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: Linux Kernel vulnerability may affect IBM Elastic Storage System (CVE-2021-4203)