CVE-2023-2861

Qemu: 9pfs: improper access control on special files

At a glance

Severity: MEDIUM 6.0
EPSS: EPSS 0.38 % · percentile 31 (2026-10-27)
State: PUBLISHED
Published: 2023-12-06
Updated: 2024-08-02
Assigner: fedora
NVD status: Modified

Description

A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.0	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N	fedora
CVSS 3.1	MEDIUM 6.0	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N	NVD · patrick@puiterwijk.org (Secondary)
CVSS 3.1	HIGH 7.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-284

European references

ENISA EUVD · EUVD-2023-34310
GCVE · GCVE-0-2023-2861

CERT-FR advisories

CERTFR-2024-AVI-0619 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2024-AVI-0119 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* < 8.1.0

Affected products

Product	Versions
qemu	unaffected 8.1.0-rc0 < *

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD