CVE-2021-20181 Information

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.

CVSS Vector

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

Reference

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/

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.5