CVE-2023-2861 Qemu: 9pfs: improper access control on special files

2023-12-0606:19:40

CWE-284

fedora

www.cve.org

qemu

9pfs

access control

security flaw

cve-2023-2861

6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

7.3 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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.

CNA Affected

[
  {
    "versions": [
      {
        "status": "unaffected",
        "version": "8.1.0-rc0",
        "lessThan": "*",
        "versionType": "semver"
      }
    ],
    "packageName": "qemu",
    "collectionURL": "https://gitlab.com/qemu-project/qemu",
    "defaultStatus": "affected"
  }
]