#VU51533 Information disclosure in Argo CD - CVE-2021-26923

Vulnerability identifier: #VU51533

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-26923

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Argo CD
Web applications / Modules and components for CMS

Vendor: Argo

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in "/api/version" endpoint. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Argo CD: 1.7.0 - 1.7.11, 1.8.0 - 1.8.3

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External links
https://github.com/argoproj/argo-cd/compare/v1.8.3...v1.8.4
https://github.com/argoproj/argo-cd/security/advisories/GHSA-pfgj-mh5m-2p48

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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.