CVE-2024-40634: argo cd DoS — Exploit & Fix

Description

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. This report details a security vulnerability in Argo CD, where an unauthenticated attacker can send a specially crafted large JSON payload to the /api/webhook endpoint, causing excessive memory allocation that leads to service disruption by triggering an Out Of Memory (OOM) kill. The issue poses a high risk to the availability of Argo CD deployments. This vulnerability is fixed in 2.11.6, 2.10.15, and 2.9.20.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor	Product	Versions
argoproj	argo_cd	1.0.0 — 2.9.20
argoproj	argo_cd	2.10.0 — 2.10.15
argoproj	argo_cd	2.11.0 — 2.11.6

References

Advisories & Patches

Exploits

https://github.com/argoproj/argo-cd/security/advisories/GHSA-jmvp-698c-4x3w https://github.com/argoproj/argo-cd/security/advisories/GHSA-jmvp-698c-4x3w

Frequently Asked Questions

What is CVE-2024-40634? +

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. This report details a security vulnerability in Argo CD, where an unauthenticated attacker can send a specially crafted large JSON payload to the /api/webhook endpoint, causing excessive memory allocation that leads to service disruption by triggering an Out Of Memory (OOM) kill. The issue poses a high risk to the availability of Argo CD deployments. This vulnerability is fixed in 2.11.6, 2.10.15, and 2.9.20. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-40634? +

CVE-2024-40634 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-40634? +

CVE-2024-40634 affects products from argoproj, specifically: argo_cd. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-40634? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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