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GHSA-g687-f2gx-6wm8
No affected components available
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 or discussions
- Join us on 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
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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