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Security Bulletin: Vulnerability in sed affects IBM SAN Volume Controller, IBM Storwize, IBM Spectrum Virtualize and IBM FlashSystem V9000 products

Security Bulletin


A vulnerability in the sed command could allow an authenticated attacker to escape from a restricted shell to obtain sensitive information and cause a denial of service.

Vulnerability Details

CVEID:   CVE-2021-29873
DESCRIPTION:   IBM Flash System 900 could allow an authenticated attacker to obtain sensitive information and cause a denial of service due to a restricted shell escape vulnerability.
CVSS Base score: 8.8
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM SAN Volume Controller
IBM Storwize V7000
IBM Storwize V5000
IBM Storwize V5100
IBM Storwize V3700
IBM Storwize V3500
IBM FlashSystem V9000
IBM FlashSystem 9100 Family
IBM FlashSystem 9200
IBM FlashSystem 7200
IBM FlashSystem 5200
IBM FlashSystem 5000
IBM Spectrum Virtualize Software
IBM Spectrum Virtualize for Public Cloud

All products are affected when running supported versions 7.8 to 8.4 (except and later).


IBM recommends that you fix this vulnerability by upgrading affected versions of IBM SAN Volume Controller, IBM Storwize V7000, IBM Storwize V5000 and V5100, IBM Storwize V5000E, IBM Spectrum Virtualize Software, IBM Spectrum Virtualize for Public Cloud, IBM FlashSystem V9000, IBM FlashSystem 9100 Family, IBM FlashSystem 9200, IBM FlashSystem 7200, IBM FlashSystem 5200 and IBM FlashSystem 5000 to the following code levels or higher:

Latest IBM SAN Volume Controller Code
Latest IBM Storwize V7000 Code
Latest IBM Storwize V5000 and V5100 Code
Latest IBM Storwize V5000E Code
Latest IBM Storwize V3700 Code
Latest IBM Storwize V3500 Code
Latest IBM FlashSystem V9000 Code
Latest IBM FlashSystem 9100 Family Code
Latest IBM FlashSystem 9200 Code
Latest IBM FlashSystem 7200 Code
Latest IBM FlashSystem 5000 and 5200 Code
Latest IBM Spectrum Virtualize Software
Latest IBM Spectrum Virtualize for Public Cloud

For the Storage Nodes of IBM FlashSystem 900, please apply the fixes recommended in the IBM FlashSystem security bulletin for this issue.

Workarounds and Mitigations

The attacker needs to be authenticated as a user on the system to exploit this vulnerability, so it may be mitigated by only configuring users that can be trusted with administrator privileges.

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The vulnerability was reported to IBM by Kir Ermakov (

Change History

12 Oct 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


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Document Information

Modified date:
24 May 2022