CVE-2022-35507
7.1 · HIGHOverview
CVE-2022-35507 is a high-severity vulnerability affecting proxmox proxmox_mail_gateway. It was published on December 4, 2022 and has a CVSS 3.1 base score of 7.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A response-header CRLF injection vulnerability in the Proxmox Virtual Environment (PVE) and Proxmox Mail Gateway (PMG) web interface allows a remote attacker to set cookies for a victim's browser that are longer than the server expects, causing a client-side DoS. This affects Chromium-based browsers because they allow injection of response headers with %0d. 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-2022-35507?
CVE-2022-35507 is a high-severity vulnerability affecting proxmox proxmox_mail_gateway. It was published on December 4, 2022 and has a CVSS 3.1 base score of 7.1 (HIGH).
How severe is CVE-2022-35507?
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2022-35507?
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-2022-35507?
CyberStrike's AI-powered security agents can automatically detect CVE-2022-35507 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.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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