OpenShift Service Mesh 2 update for servicemesh

1) Improper Authorization

EUVDB-ID: #VU53523

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-31921

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authorization procedure.

The vulnerability exists due to a logic issue when the istio gateway is configured with TLS mode `AUTO_PASSTHROUGH`. A remote non-authenticated attacker can bypass authorization checks and gain unauthorized access to services in the cluster.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenShift Service Mesh: 2.0.0 - 2.0.4

servicemesh (Red Hat package): 0.12.0-8.el8

CPE2.3

• cpe:2.3:a:red_hat:openshift_service_mesh:2.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:servicemesh_redhat_package:0.12.0-8.el8:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2021:2061

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.