Improper Authentication in Argo CD tool for Kubernetes

1) Improper Authentication

EUVDB-ID: #VU27018

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-8827

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the Argo API does not implement anti-automation measures such as rate limiting, account lockouts, or other anti-bruteforce measures. A remote attacker can submit an unlimited number of authentication attempts without consequence, bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Argo CD: 1.0.0 - 1.5.0

CPE2.3

• cpe:2.3:a:argo:argo-cd:1.0.2:*:*:*:*:kubernetes:*:*
• cpe:2.3:a:argo:argo-cd:1.1.2:*:*:*:*:kubernetes:*:*
• cpe:2.3:a:argo:argo-cd:1.2.5:*:*:*:*:kubernetes:*:*
• cpe:2.3:a:argo:argo-cd:1.3.6:*:*:*:*:kubernetes:*:*
• cpe:2.3:a:argo:argo-cd:1.4.3:*:*:*:*:kubernetes:*:*
• cpe:2.3:a:argo:argo-cd:1.5.0:*:*:*:*:kubernetes:*:*

External links

https://argoproj.github.io/argo-cd/operator-manual/user-management/#disable-admin-user
https://argoproj.github.io/argo-cd/security_considerations/
https://github.com/argoproj/argo/releases
https://www.soluble.ai/blog/argo-cves-2020

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.