CVE-2021-20221

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-20221
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.

6.0 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.5 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

2.1 /10

CVSS v2.0 : LOW

V2 Legend

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1924601 Issue Tracking Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/05/1 Mailing List Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20210708-0005/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:arm64:*

Configuration 2 (hide)

OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
History

07 Nov 2023, 03:29

Type Values Removed Values Added
CWE CWE-787

12 Feb 2023, 22:15

Type Values Removed Values Added
CWE CWE-125
Summary An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU on 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. 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.
References
  • {'url': 'https://access.redhat.com/security/cve/CVE-2021-20221', 'name': 'https://access.redhat.com/security/cve/CVE-2021-20221', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2021:3061', 'name': 'https://access.redhat.com/errata/RHSA-2021:3061', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2021:1125', 'name': 'https://access.redhat.com/errata/RHSA-2021:1125', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://www.openwall.com/lists/oss-security/2021/02/05/1', 'name': 'https://www.openwall.com/lists/oss-security/2021/02/05/1', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2021:2521', 'name': 'https://access.redhat.com/errata/RHSA-2021:2521', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://bugs.launchpad.net/qemu/+bug/1914353', 'name': 'https://bugs.launchpad.net/qemu/+bug/1914353', 'tags': [], 'refsource': 'MISC'}

02 Feb 2023, 21:20

Type Values Removed Values Added
References
  • (MISC) https://access.redhat.com/security/cve/CVE-2021-20221 -
  • (MISC) https://access.redhat.com/errata/RHSA-2021:3061 -
  • (MISC) https://access.redhat.com/errata/RHSA-2021:1125 -
  • (MISC) https://www.openwall.com/lists/oss-security/2021/02/05/1 -
  • (MISC) https://access.redhat.com/errata/RHSA-2021:2521 -
  • (MISC) https://bugs.launchpad.net/qemu/+bug/1914353 -
CWE CWE-125
Summary 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. An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU on 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.

30 Sep 2022, 15:18

Type Values Removed Values Added
CPE cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
References (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html - Mailing List, Third Party Advisory

05 Sep 2022, 06:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html -

10 Dec 2021, 19:56

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20210708-0005/ - Third Party Advisory
CPE cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:arm64:*

04 Jun 2021, 16:35

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : 2.1
v3 : 6.0
CPE cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
CWE CWE-787
CWE-125
References (MLIST) http://www.openwall.com/lists/oss-security/2021/02/05/1 - (MLIST) http://www.openwall.com/lists/oss-security/2021/02/05/1 - Mailing List, Patch, Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html - (MLIST) https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html - Mailing List, Third Party Advisory
References (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1924601 - (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1924601 - Issue Tracking, Patch, Third Party Advisory

13 May 2021, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-05-13 16:15

Updated : 2023-11-07 03:29

NVD link : CVE-2021-20221

Mitre link : CVE-2021-20221

CVE.ORG link : CVE-2021-20221

JSON object : View

Products Affected

debian

  • debian_linux

qemu

  • qemu

redhat

  • enterprise_linux
CWE
CWE-125

Out-of-bounds Read