CVE-2022-35507

HIGH
Published Dec 4, 20223y ago · Modified Jun 17, 20262w ago
7.1 CVSS 3.1
High
Find Similar
Published Dec 4, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.1
Exploitability
2.8
Impact
4.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity Low
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-74

Affected Products 3

VendorProductVersionRange
proxmoxproxmox_mail_gateway*any
proxmoxpve_http_server* <4.1-3
proxmoxvirtual_environment*any

References 2

  • git.proxmox.com https://git.proxmox.com/?p=pve-http-server.git%3Ba=commitdiff%3Bh=936007ae0241811093155000486da171379c23c2
  • starlabs.sg https://starlabs.sg/blog/2022/12-multiple-vulnerabilites-in-proxmox-ve--proxmox-mail-gateway/
    ExploitPatchTechnical DescriptionThird Party Advisory

Remediation

  • starlabs.sg https://starlabs.sg/blog/2022/12-multiple-vulnerabilites-in-proxmox-ve--proxmox-mail-gateway/
    ExploitPatchTechnical DescriptionThird Party Advisory