6

CVE-2021-20221

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.

Data is provided by the National Vulnerability Database (NVD)
Qemu ≫ Qemu HwPlatformarm64 Version <= 4.2.0
Redhat ≫ Enterprise Linux Version8.0 SwEdition-
Redhat ≫ Enterprise Linux Version8.0 SwEditionadvanced_virtualization
Debian ≫ Debian Linux Version9.0
Debian ≫ Debian Linux Version10.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.02% 0.022
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 6 1.5 4
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
nvd@nist.gov 2.1 3.9 2.9
AV:L/AC:L/Au:N/C:N/I:N/A:P
CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

http://www.openwall.com/lists/oss-security/2021/02/05/1
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https://bugzilla.redhat.com/show_bug.cgi?id=1924601
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