CVE-2021-20221

 

Published at: - 13-05-2021 06:15

Last modified: - 05-09-2022 08:15

Total changes: - 5

Description

An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• [debian-lts-announce] 20210218 [SECURITY] [DLA 2560-1] qemu security update-Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1924601
• [oss-security] 20210205 CVE-2021-20221 QEMU: aarch64: GIC: out-of-bound heap buffer access via an interrupt ID field-Mailing List, Patch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210708-0005/
• [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update-

 

Keywords

NVD

 

CVE-2021-20221

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures