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Security Bulletin: A vulnerability in Samba affects IBM Spectrum Scale SMB protocol access method (CVE-2021-43566)

Security Bulletin


Summary

A Samba vulnerability affects IBM Spectrum Scale SMB protocol access method that could allow a remote attacker to bypass security restrictions and gain unauthorized access to files

Vulnerability Details

CVEID:   CVE-2021-43566
DESCRIPTION:   Samba could allow a remote authenticated attacker to bypass security restrictions, caused by a symlink race error. By using a specially-crafted SMB1 or NFS symlink, an attacker could exploit this vulnerability to create a directory in a part of the server file system not exported under the share definition.
CVSS Base score: 2.6
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/217058 for the current score.
CVSS Vector: (CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Spectrum Scale5.1.0 - 5.1.2.2

Remediation/Fixes

For IBM Spectrum Scale V5.1.0 through V5.1.2.2, apply V5.1.3 or later available from FixCentral at :

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Spectrum+Scale&release=5.1.3&platform=Linux+PPC64LE&function=all

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

18 Apr 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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Document Information

Modified date:
27 April 2022

UID

ibm16575377

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