CVE-2021-20181

high

Description

A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1927007

https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html

https://www.zerodayinitiative.com/advisories/ZDI-21-159/

https://security.netapp.com/advisory/ntap-20210720-0009/

Details

Source: MITRE

Published: 2021-05-13

Updated: 2022-08-05

Type: CWE-362

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7.5

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

Impact Score: 6

Exploitability Score: 0.8

Severity: HIGH