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Ubuntu.comUB:CVE-2021-20221
HistoryMay 13, 2021 - 12:00 a.m.

CVE-2021-20221

2021-05-1300:00:00
ubuntu.com
ubuntu.com
8

6 Medium

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

2.1 Low

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

12.1%

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.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchqemu< 1:4.2-3ubuntu6.17UNKNOWN
ubuntu20.10noarchqemu< 1:5.0-5ubuntu9.9UNKNOWN
ubuntu21.04noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu16.04noarchqemu< anyUNKNOWN
ubuntuupstreamnoarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu21.10noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu22.04noarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntuupstreamnoarchqemu< 1:5.2+dfsg-6ubuntu2UNKNOWN
ubuntu14.04noarchqemu< anyUNKNOWN
ubuntuupstreamnoarchqemu< anyUNKNOWN
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6 Medium

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

2.1 Low

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

12.1%

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