Security Bulletin
Summary
A privilege escalation vulnerability has been discovered in pkexec, a component of polkit. The TSSC does not use pkexec, but the executable does exist on the system. A patch has been provided that removes the executable from the file system.
Vulnerability Details
CVEID: CVE-2021-4034
DESCRIPTION: Polkit could allow a local authenticated attacker to gain elevated privileges on the system, caused by incorrect handling of the argument vectors in the pkexec utility. By crafting environment variables in a specific way, an attacker could exploit this vulnerability to execute commands with root privileges.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/218087 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
| Affected Product | Version |
| TSSC/IMC | 9.2.16 |
| TSSC/IMC | 9.2.14 |
| TSSC/IMC | 9.2.11 |
| TSSC/IMC | 9.1.11 |
| TSSC/IMC | 9.1.9 |
| TSSC/IMC | 9.1.7 |
| TSSC/IMC | 9.0.6 |
| TSSC/IMC | 9.0.4 |
| TSSC/IMC | 8.6.6 |
| TSSC/IMC | 8.5.5 |
Remediation/Fixes
IBM strongly recommends addressing the vulnerability now.
| Product | Version | Remediation/Fix/Instructions |
| TSSC/IMC | 9.2.16 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.2.14 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.2.11 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.1.11 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.1.9 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.1.7 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.0.6 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 9.0.4 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 8.6.6 | Download patch and execute on TSSC/IMC system |
| TSSC/IMC | 8.5.5 | Download patch and execute on TSSC/IMC system |
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Change History
29 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
Was this topic helpful?
Document Information
Modified date:
05 May 2022
Initial Publish date:
29 April 2022
UID
ibm16583163