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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2021-20221
HistoryMay 13, 2021 - 4:15 p.m.

CVE-2021-20221

2021-05-1316:15:07
Debian Security Bug Tracker
security-tracker.debian.org
22

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

6

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

EPSS

0

Percentile

14.2%

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.

OSVersionArchitecturePackageVersionFilename
Debian12allqemu< 1:5.2+dfsg-4qemu_1:5.2+dfsg-4_all.deb
Debian11allqemu< 1:5.2+dfsg-4qemu_1:5.2+dfsg-4_all.deb
Debian999allqemu< 1:5.2+dfsg-4qemu_1:5.2+dfsg-4_all.deb
Debian13allqemu< 1:5.2+dfsg-4qemu_1:5.2+dfsg-4_all.deb

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

6

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

EPSS

0

Percentile

14.2%