CVE Catalog

CVE-2023-54391

CriticalCVSS 9.8
Published: Translated: NVD NIST

Summary

Proxmox Virtual Environment (VE) versions 7.0 through 8.0 contain an authentication bypass vulnerability in libpve-access-control before 8.0.4, allowing unauthenticated attackers to authenticate as any existing enabled user without a configured second factor by supplying an arbitrary tfa-challenge value in the API login endpoint. Attackers can completely skip password verification, gaining unauthorized access including to the root@pam account. All affected releases are end of life.

Risk Assessment

An unauthenticated attacker can gain full access to the Proxmox system, including the administrator account, leading to complete compromise of the virtualization environment.

Recommendation

Immediately upgrade to a supported Proxmox VE version (8.0.4 or later) or migrate to a newer release, as affected versions are end-of-life.

Related vulnerabilities

Original NVD description (English source)

Proxmox Virtual Environment (VE) 7.0 through 8.0 contains an authentication bypass vulnerability in libpve-access-control before 8.0.4 that allows unauthenticated attackers to authenticate as any existing enabled user without a configured second factor by supplying an arbitrary tfa-challenge value in the API login endpoint. Attackers can send a POST request to the access ticket API endpoint with any value in the tfa-challenge parameter to completely skip password verification, gaining unauthorized access including to the root@pam account. All affected releases are end of life.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS