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CVE-2023-2861

Published: 30 June 2023

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.

Priority

Low

Cvss 3 Severity Score

7.1

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic Needs triage

focal
Released (1:4.2-3ubuntu6.28)
jammy
Released (1:6.2+dfsg-2ubuntu6.16)
kinetic Ignored
(end of life, was needed)
lunar
Released (1:7.2+dfsg-5ubuntu2.4)
mantic Not vulnerable
(1:8.0.4+dfsg-1ubuntu3)
trusty Needs triage

upstream Needs triage

xenial Needs triage

Patches:
upstream: https://gitlab.com/qemu-project/qemu/-/commit/f6b0de53fb87ddefed348a39284c8e2f28dc4eda

Severity score breakdown

Parameter Value
Base score 7.1
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N