CVE-2022-35508
CRITICAL
Published Dec 4, 20223y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Published Dec 4, 2022 3y ago
Last Modified Jun 17, 2026 2w ago
Description
Proxmox Virtual Environment (PVE) and Proxmox Mail Gateway (PMG) are vulnerable to SSRF when proxying HTTP requests between pve(pmg)proxy and pve(pmg)daemon. An attacker with an unprivileged account can craft an HTTP request to achieve SSRF and file disclosure of any files on the server. Also, in Proxmox Mail Gateway, privilege escalation to the root@pam account is possible if the backup feature has ever been used, because backup files such as pmg-backup_YYYY_MM_DD_*.tgz have 0644 permissions and contain an authkey value. This is fixed in pve-http-server 4.1-3.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
No active exploitation signals — not in CISA KEV and no EPSS score yet.
Exploit & Patch Status
Public Exploit Known
Patch Available
Weaknesses 1
CWE-918 Server-Side Request Forgery (SSRF) Validation
Affected Products 3
References 4
- git.proxmox.com https://git.proxmox.com/?p=pve-http-server.git%3Ba=commitdiff%3Bh=580d540ea907ba15f64379c5bb69ecf1a49a875f
- git.proxmox.com https://git.proxmox.com/?p=pve-http-server.git%3Ba=commitdiff%3Bh=c2bd69c7b5e9c775f96021cf8ae53da3dbd9029d
- git.proxmox.com https://git.proxmox.com/?p=pve-http-server.git%3Ba=commitdiff%3Bh=e9df8a6e76b2a18f89295a5d92a62177bbf0f762
- starlabs.sg https://starlabs.sg/blog/2022/12-multiple-vulnerabilites-in-proxmox-ve--proxmox-mail-gateway/
Remediation
- starlabs.sg https://starlabs.sg/blog/2022/12-multiple-vulnerabilites-in-proxmox-ve--proxmox-mail-gateway/