Vulnerability in Proxmox Backup Server
CVE-2023-43320
An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (71.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.014 · change: +0.004
Affected products
Public proof-of-concept exploits
References
- bugzilla.proxmox.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- bugzilla.proxmox.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- github.com/proxmox/proxmox-rs/commit/50b793db8d3421bbfe2bce060a486263f18a90cb (Patch)
- packetstormsecurity.com/files/176967/Proxmox-VE-7.4-1-TOTP-Brute-Force.html
Frequently asked questions
- What is CVE-2023-43320?
- CVE-2023-43320 is a high-severity vulnerability in Proxmox Backup Server. CVSS score: 8.8/10. Published 2023-09-27.
- How severe is CVE-2023-43320?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-43320 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.