Remote code execution in OpenShift Container Platform 4.7

Published: 2021-09-09

Risk	High
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-3121
CWE-ID	CWE-129
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Red Hat OpenShift Container Platform Client/Desktop applications / Software for system administration
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Improper Validation of Array Index

EUVDB-ID: #VU52902

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3121

CWE-ID: CWE-129 - Improper Validation of Array Index

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to improper validation of index array in plugin/unmarshal/unmarshal.go. A remote attacker can pass specially crafted data to the application and bypass implemented security restrictions, possibly leading to remote code execution.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.7.0 - 4.7.28

External links

http://access.redhat.com/errata/RHSA-2021:3303

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.