CVE-2022-35508 Server-side request forgery in n/a
Unprivileged attackers can exploit SSRF to read server files and potentially escalate privileges to root via exposed backup keys in Proxmox environments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-35508?
CVE-2022-35508 is a critical server-side request forgery vulnerability in n/a, published on 4 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2022-35508?
It affects 3 products.
Products include Proxmox Proxmox Mail Gateway, Proxmox Pve Http Server, Proxmox Virtual Environment.
How do I fix CVE-2022-35508?
No fix has been published for CVE-2022-35508 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2022-35508 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-35508 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-jfjw-xc26-6xpm.