Vulnerability CVE-2021-20221

Vulnerability Name:

CVE-2021-20221 (CCN-196343)

Assigned:

2020-12-17

Published:

2021-02-02

Updated:

2023-02-12

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.

CVSS v3 Severity:

6.0 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:H/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): High User Interaction (UI): None
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

6.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:H/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): High User Interaction (UI): None
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

2.5 Low (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L)
2.4 Low (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L/E:H/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): High Privileges Required (PR): High User Interaction (UI): None
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

CWE-787

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2021-20221

Source: secalert@redhat.com
Type: Mailing List, Patch, Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com

Source: XF
Type: UNKNOWN
qemu-cve202120221-dos(196343)

Source: CCN
Type: QEMU GIT Repository
hw/intc/arm_gic: Fix interrupt ID in GICD_SGIR register

Source: secalert@redhat.com
Type: Mailing List, Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Mailing List, Third Party Advisory
secalert@redhat.com

Source: CCN
Type: oss-sec Mailing List, Fri, 5 Feb 2021 12:41:59 +0530 (IST)
CVE-2021-20221 QEMU: aarch64: GIC: out-of-bound heap buffer access via an interrupt ID field

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Vulnerable Configuration:

Configuration RedHat 1:

cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

Configuration RedHat 2:

cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

Configuration RedHat 3:

cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*

Configuration CCN 1:

cpe:/a:qemu:qemu:-:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:8013	P	go1.19-1.19.9-150000.1.31.1 on GA media (Moderate)	2023-06-20
oval:org.opensuse.security:def:7791	P	qemu-tools-7.1.0-150500.47.15 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:618	P	Security update for python (Important) (in QA)	2022-10-06
oval:org.opensuse.security:def:3187	P	libidn-tools-1.28-5.6.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3560	P	libXi6-1.7.4-18.6.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3518	P	guile-2.0.9-9.3.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:94817	P	qemu-tools-6.2.0-150400.35.10 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:94672	P	liboath-devel-2.6.2-1.15 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:95148	P	qemu-6.2.0-150400.35.10 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:296	P	qemu-tools-5.2.0-9.18 on GA media (Moderate)	2022-06-13
oval:org.opensuse.security:def:351	P	qemu-6.2.0-150400.35.10 on GA media (Moderate)	2022-06-10
oval:org.opensuse.security:def:113318	P	qemu-6.1.0-32.1 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:5943	P	Security update for mariadb (Moderate)	2021-12-30
oval:org.opensuse.security:def:99440	P	(Moderate)	2021-12-06
oval:org.opensuse.security:def:1225	P	Security update for java-1_8_0-openjdk (Important)	2021-11-23
oval:org.opensuse.security:def:106728	P	qemu-6.1.0-32.1 on GA media (Moderate)	2021-10-01
oval:org.opensuse.security:def:102204	P	Security update for mariadb (Moderate)	2021-09-03
oval:org.opensuse.security:def:2279	P	qemu-5.2.0-9.18 on GA media (Moderate)	2021-08-10
oval:org.opensuse.security:def:63368	P	qemu-5.2.0-9.18 on GA media (Moderate)	2021-08-10
oval:org.opensuse.security:def:101385	P	nut-2.7.4-4.72 on GA media (Moderate)	2021-08-10
oval:org.opensuse.security:def:101394	P	qemu-5.2.0-9.18 on GA media (Moderate)	2021-08-10
oval:com.redhat.rhsa:def:20213061	P	RHSA-2021:3061: virt:rhel and virt-devel:rhel security and bug fix update (Moderate)	2021-08-10
oval:org.opensuse.security:def:72055	P	qemu-tools-5.2.0-9.18 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:62314	P	qemu-tools-5.2.0-9.18 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:101072	P	qemu-tools-5.2.0-9.18 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:40423	P	Security update for kvm (Important)	2021-08-06
oval:org.opensuse.security:def:44853	P	Security update for kvm (Important)	2021-08-06
oval:org.opensuse.security:def:38199	P	Security update for kvm (Important)	2021-08-06
oval:org.opensuse.security:def:41467	P	Security update for kvm (Important)	2021-08-03
oval:org.opensuse.security:def:45897	P	Security update for kvm (Important)	2021-08-03
oval:org.opensuse.security:def:6284	P	Security update for caribou (Important)	2021-06-10
oval:org.opensuse.security:def:32939	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:58762	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:86098	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:31194	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:57017	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:84155	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:86577	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:31634	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:57457	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:84613	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:87403	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:32113	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:57936	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:85658	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:23593	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:51581	P	Security update for qemu (Important)	2021-06-08
oval:org.opensuse.security:def:29371	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:55194	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:82578	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:30081	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:55904	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:83288	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:30201	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:56024	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:83408	P	Security update for qemu (Important)	2021-06-02
oval:org.opensuse.security:def:99639	P	(Important)	2021-06-01
oval:org.opensuse.security:def:23885	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:51873	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:92490	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:96857	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:8740	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:69631	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:88414	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:93194	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:9690	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:91901	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:99046	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:33635	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:59458	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:125518	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:92689	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:96858	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:8935	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:69830	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:99945	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:89113	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:10061	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:92096	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:99241	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:33893	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:59716	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:126689	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:92888	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:9307	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:70201	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:89371	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:10241	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:92291	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:8562	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:69447	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:34409	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:60232	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:88102	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:127086	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:93041	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:9491	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:70381	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:98851	P	Security update for qemu (Important)	2021-04-16
oval:org.opensuse.security:def:111243	P	Security update for qemu (Important)	2021-03-01
oval:org.opensuse.security:def:96094	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:118546	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:108051	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:102784	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:67373	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:108870	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:73771	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:69102	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:109450	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:76100	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:97224	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:64649	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:95491	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:117565	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:76441	P	Security update for qemu (Important)	2021-02-19
oval:org.opensuse.security:def:67032	P	Security update for qemu (Important)	2021-02-19

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