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Fencer Intel
high 8.2

CVE-2024-21545 json

Proxmox Virtual Environment is an open-source server management platform for enterprise virtualization.

published 2y ago modified 4mo ago also EUVD-2024-19198

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

Proxmox Virtual Environment is an open-source server management platform for enterprise virtualization. Insufficient safeguards against malicious API response values allow authenticated attackers with 'Sys.Audit' or 'VM.Monitor' privileges to download arbitrary host files via the API. When handling the result from a request handler before returning it to the user, the handle_api2_request function will check for the ‘download’ or ‘data’->’download’ objects inside the request handler call response object. If present, handle_api2_request will read a local file defined by this object and return it to the user. Two endpoints were identified which can control the object returned by a request handler sufficiently that the ’download’ object is defined and user controlled. This results in arbitrary file read. The privileges of this file read can result in full compromise of the system by various impacts such as disclosing sensitive files allowing for privileged session forgery.

Patch / fix

  • Proxmox pve-manager 7.4-19, 8.2.7
  • Proxmox libpve-storage-perl 7.4-4, 8.2.5
  • Proxmox libpve-http-server-perl 4.3.0, 5.1.1
  • Proxmox pmg-api 7.3-12, 8.1.4
  • Proxmox libpve-common-perl (Promox VE 8) 8.2.3
  • Proxmox libpve-common-perl (Promox Mail Gateway 8) 8.2.5
  • proxmox mail_gateway 7.2, 8.1-1
  • proxmox virtual_environment 7.3, 8.2-2

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2y ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

  • Proxmox pve-manager
  • Proxmox libpve-storage-perl
  • Proxmox libpve-http-server-perl
  • Proxmox pmg-api
  • Proxmox libpve-common-perl (Promox VE 8)
  • Proxmox libpve-common-perl (Promox Mail Gateway 8)
  • proxmox mail_gateway
  • proxmox virtual_environment

Classification

Weakness
  • CWE-73 External Control of File Name or Path

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.