CVE-2021-20221

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

References

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

https://bugzilla.redhat.com/show_bug.cgi?id=1924601

http://www.openwall.com/lists/oss-security/2021/02/05/1

https://security.netapp.com/advisory/ntap-20210708-0005/

Details

Source: MITRE

Published: 2021-05-13

Updated: 2021-12-10

Type: CWE-787

Risk Information

CVSS v2

Base Score: 2.1

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

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 6

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

Impact Score: 4

Exploitability Score: 1.5

Severity: MEDIUM

Tenable Plugins

View all (21 total)

IDNameProductFamilySeverity
156382EulerOS Virtualization 3.0.2.0 : qemu (EulerOS-SA-2021-2844)NessusHuawei Local Security Checks
high
155742Oracle Linux 8 : kvm_utils (ELSA-2021-9568)NessusOracle Linux Local Security Checks
high
152538Oracle Linux 8 : virt:ol / and / virt-devel:rhel (ELSA-2021-3061)NessusOracle Linux Local Security Checks
medium
152461CentOS 8 : virt:rhel and virt-devel:rhel (CESA-2021:3061)NessusCentOS Local Security Checks
medium
152445RHEL 8 : virt:rhel and virt-devel:rhel (RHSA-2021:3061)NessusRed Hat Local Security Checks
medium
152199SUSE SLES11 Security Update : kvm (SUSE-SU-2021:14772-1)NessusSuSE Local Security Checks
medium
151680Ubuntu 18.04 LTS / 20.04 LTS / 20.10 / 21.04 : QEMU vulnerabilities (USN-5010-1)NessusUbuntu Local Security Checks
high
151564EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2021-2192)NessusHuawei Local Security Checks
high
151557EulerOS Virtualization 2.9.0 : qemu (EulerOS-SA-2021-2211)NessusHuawei Local Security Checks
high
151018RHEL 8 : virt:8.2 and virt-devel:8.2 (RHSA-2021:2521)NessusRed Hat Local Security Checks
medium
150399SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1894-1)NessusSuSE Local Security Checks
medium
150299Oracle Linux 7 : qemu (ELSA-2021-9285)NessusOracle Linux Local Security Checks
medium
150203SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1829-1)NessusSuSE Local Security Checks
medium
148761SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1241-1)NessusSuSE Local Security Checks
high
148757SUSE SLES15 Security Update : qemu (SUSE-SU-2021:1244-1)NessusSuSE Local Security Checks
high
148752SUSE SLES15 Security Update : qemu (SUSE-SU-2021:1245-1)NessusSuSE Local Security Checks
high
148751SUSE SLES12 Security Update : qemu (SUSE-SU-2021:1242-1)NessusSuSE Local Security Checks
high
148394RHEL 8 : virt:8.3 and virt-devel:8.3 (RHSA-2021:1125)NessusRed Hat Local Security Checks
medium
146938openSUSE Security Update : qemu (openSUSE-2021-363)NessusSuSE Local Security Checks
high
146643SUSE SLED15 / SLES15 Security Update : qemu (SUSE-SU-2021:0521-1)NessusSuSE Local Security Checks
high
146609Debian DLA-2560-1 : qemu security updateNessusDebian Local Security Checks
high