#VU51534 Insufficient Session Expiration in Argo CD - CVE-2021-26921

Vulnerability identifier: #VU51534

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-26921

CWE-ID: CWE-613

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 sensitive information.

The vulnerability exists due to insufficient session expiration issue in util/session/sessionmanager.go. A remote attacker can obtain or guess session token and gain unauthorized access to session that belongs to another user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Argo CD: 1.7.0 - 1.7.11, 1.8.0 - 1.8.3

---

External links
https://github.com/argoproj/argo-cd/commit/f5b0db240b4e3abf18e97f6fd99096b4f9e94dc5
https://github.com/argoproj/argo-cd/compare/v1.8.3...v1.8.4
https://github.com/argoproj/argo-cd/security/advisories/GHSA-9h6w-j7w4-jr52

---

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.