Security Bulletin
Summary
A vulnerability exists in the IBM FlashSystem 900 restricted shell (CVE-2021-29873). An exploit of this vulnerability could allow an authenticated attacker to access sensitive information or 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: https://exchange.xforce.ibmcloud.com/vulnerabilities/206229 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
Storage Node machine type and models (MTMs) affected:
- 9840-AE1 and 9843-AE1
- 9840-AE2 and 9843-AE2
- 9840-AE3 and 9843-AE3
- VRMFs prior to 1.5.2.10
- VRMFs prior to 1.6.1.4
Remediation/Fixes
MTMs | VRMF | APAR | Remediation/First Fix |
---|---|---|---|
FlashSystem 840 MTMs:
9840-AE1 and 9843-AE1 FlashSystem 900 MTMs: 9843-UF3, 9840-AE2, 9843-AE2, 9840-AE3, and 9843-AE3 Note: AE1 systems are no longer supported. |
Code fixes are now available, the minimum VRMF containing the fix depending on the code stream: Fixed Code VRMF: 1.6 stream: 1.6.1.4 1.5 stream: 1.5.2.10 | N/A | FlashSystem 900 fixes are available at IBM's Fix Central website. FlashSystem 840 is no longer supported. |
Workarounds and Mitigations
Upgrade to the relevant remediated code version or later. Outside of upgrade, 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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References
Acknowledgement
The vulnerability was reported to IBM by Kir Ermakov (isox@vulners.com).
Change History
20 October 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:
28 October 2021
UID
ibm16507091