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-2021-20254
DESCRIPTION: Samba could allow a remote authenticated attacker to bypass security restrictions, caused by a coding error when converting SIDs to gids. By sending a specially-crafted request, an attacker could exploit this vulnerability to cause incorrect group entries in the Samba file server process token, and allows unauthorized access to files
CVSS Base score: 6.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/201081 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Spectrum Scale | 5.1.0 - 5.1.1.2 |
Remediation/Fixes
For IBM Spectrum Scale V5.0.1.0 through V5.1.1.2, apply V5.1.1.3 or V5.1.2 or later available from FixCentral at :
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Change History
06 Dec 2021: 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:
06 December 2021
Initial Publish date:
06 December 2021
UID
ibm16523766