Improper Validation of Array Index in Red Hat OpenShift Container Platform 4.7

1) Improper Validation of Array Index

EUVDB-ID: #VU52902

Risk: High

CVSSv4.0: 6.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

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

openshift-kuryr (Red Hat package): before 4.7.0-202103241948.p0.git.2504.add19d0.el8

openshift-clients (Red Hat package): before 4.7.0-202103251046.p0.git.3957.c4da68b.el7

jenkins-2-plugins (Red Hat package): before 4.7.1616671397-1.el8

cri-o (Red Hat package): before 1.20.2-4.rhaos4.7.gitd5a999a.el7

Red Hat OpenShift Container Platform: before

CPE2.3

• cpe:2.3:a:red_hat:openshift-kuryr_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:openshift-clients_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:jenkins-2-plugins_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:cri-o_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:*:*:*:*:*:*:*:*

External links

https://access.redhat.com/errata/RHSA-2021:1006

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.