CVE-2019-20808

2020-12-3100:00:00

ubuntu.com

qemu

out-of-bounds read

ati vga

denial of service

vulnerability

security

unix

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

6.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

12.6%

JSON

In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA
implementation. It occurs in the ati_cursor_define() routine while handling
MMIO write operations through the ati_mm_write() callback. A malicious
guest could abuse this flaw to crash the QEMU process, resulting in a
denial of service.