CVE-2022-35508
9.8 · CRITICALOverview
CVE-2022-35508 is a critical-severity vulnerability affecting proxmox proxmox_mail_gateway. It was published on December 4, 2022 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from proxmox. Update proxmox_mail_gateway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| proxmox | pve_http_server | >= 0, < 4.1-3 | Affected |
References
Frequently Asked Questions
What is CVE-2022-35508?
CVE-2022-35508 is a critical-severity vulnerability affecting proxmox proxmox_mail_gateway. It was published on December 4, 2022 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2022-35508?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2022-35508?
Check the references section for vendor advisories and patches from proxmox. Update proxmox_mail_gateway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2022-35508?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-35508 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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