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Security Bulletin: IBM Spectrum Protect Plus has Insecure File Permissions due to not setting the Sticky Bit (CVE-2021-20490)

Security Bulletin


IBM Spectrum Protect Plus has several directories that are failing security scans due to the sticky bit not being set on world-writable files.

Vulnerability Details

CVEID:   CVE-2021-20490
DESCRIPTION:   IBM Spectrum Protect Plus could allow a local user to cause a denial of service due to insecure file permission settings.
CVSS Base score: 4
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Spectrum Protect Plus10.1.0-10.1.8


This issue is resolved by applying 10.1.8 patch 1 (see download link below).  Once the 10.1.8 patch 1 is installed, the sticky bit will be set during the next scheduled run of the Maintenance job.  If the sticky bit needs to be set immediately after applying 10.1.8 patch 1, the Maintenance job can be run manually by performing the following steps:

  1. In the main menu screen of Spectrum Protect Plus, click on the "Jobs and Operations" tab.
  2. In the "Jobs and Operations" tab, click on the "Schedule" sub-tab.
  3. From the list of jobs, select "Maintenance job".
  4. Click the "Start" button to initiate the job.
  5. Sticky bit will be set once the maintenance job has completed.

IBM Spectrum Protect
Plus Release
First Fixing
VRM Level
Link to Fix

Workarounds and Mitigations


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Change History

28 June 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.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSNQFQ","label":"IBM Spectrum Protect Plus"},"Component":"","Platform":[{"code":"PF016","label":"Linux"}],"Version":"10.1","Edition":""}]

Document Information

Modified date:
28 June 2021