CVE-2022-35507

Public Exploit

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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 24.02% Top 5%
Third-Party Advisory starlabs.sg
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.proxmox.com/?p=pve-http-server.git%3Ba=commitdiff%3Bh=936007ae0241811093155000486da171379c23c2
https://starlabs.sg/blog/2022/12-multiple-vulnerabilites-in-proxmox-ve--proxmox-mail-gateway/ patch exploit third party advisory technical description

Frequently Asked Questions

What is the severity of CVE-2022-35507?
CVE-2022-35507 has been scored as a high severity vulnerability.
How to fix CVE-2022-35507?
To fix CVE-2022-35507, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-35507 being actively exploited in the wild?
It is possible that CVE-2022-35507 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~24% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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