CVE-2023-40584
Argo CD repo-server Denial of Service vulnerability
Impact
### Impact 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. ### Patches A patch for this vulnerability has been released in the following Argo CD versions: * v2.6.15 * v2.7.14 * v2.8.3 ### Workarounds The only way to completely resolve the issue is to upgrade. #### Mitigations 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. ### For more information If you have any questions or comments about this advisory: * Open an issue in [the Argo CD issue tracker](https://github.com/argoproj/argo-cd/issues) or [discussions](https://github.com/argoproj/argo-cd/discussions) * Join us on [Slack](https://argoproj.github.io/community/join-slack) in channel #argo-cd ### Credits This vulnerability was found & reported by GE Vernova – Amit Laish. The Argo team would like to thank these contributors for their responsible disclosure and constructive communications during the resolve of this issue
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/argoproj/argo-cd/v2 | >= 2.4.0, < 2.6.15 | 2.6.15 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Argoproj | Argo Cd | from 2.4.0 before 2.6.15 from 2.7.0 before 2.7.14 from 2.8.0 before 2.8.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/argoproj/argo-cd/commit/b8f92c4ff226346624f43de3f25d81dac6386674
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-g687-f2gx-6wm8
- https://github.com/advisories/GHSA-g687-f2gx-6wm8
- https://nvd.nist.gov/vuln/detail/CVE-2023-40584
- https://github.com/argoproj/argo-cd/commit/1391ba72149655e4884d357586d3201f15bc92dc
- https://github.com/argoproj/argo-cd/releases/tag/v2.6.15
- https://github.com/argoproj/argo-cd/releases/tag/v2.7.14
- https://github.com/argoproj/argo-cd/releases/tag/v2.8.3