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RedhatCVE-2021-20221

HistoryMay 13, 2021 - 4:15 p.m.

CVE-2021-20221

2021-05-1316:15:07

CWE-787

CWE-125

redhat

web.nvd.nist.gov

301

cve-2021-20221

arm

qemu

out-of-bounds

heap buffer

access issue

dos

nvd

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.4

Confidence

High

EPSS

Percentile

14.2%

JSON

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.

Affected configurations

Nvd

Vulners

Node

qemuqemuRange≤4.2.0arm64

Node

redhatenterprise_linuxMatch8.0-

redhatenterprise_linuxMatch8.0advanced_virtualization

Node

debiandebian_linuxMatch9.0

debiandebian_linuxMatch10.0

VendorProductVersionCPE
qemuqemu*cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:arm64:*
redhatenterprise_linux8.0cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
redhatenterprise_linux8.0cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
debiandebian_linux9.0cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debiandebian_linux10.0cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
qemu	qemu	*	cpe:2.3:a:qemu:qemu:::::::arm64:*
redhat	enterprise_linux	8.0	cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::
redhat	enterprise_linux	8.0	cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*

CNA Affected

[
  {
    "product": "qemu",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "up to, including qemu 4.2.0"
      }
    ]
  }
]