CVE-2021-3750

CVE Details

Release Date:2020-08-26

Description


A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.

See more information about CVE-2021-3750 from MITRE CVE dictionary and NIST NVD


CVSS v3.0 metrics


NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score: 7.5 Base Metrics: AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Access Vector: Local network Attack Complexity: High
Privileges Required: High User Interaction: None
Scope: Changed Confidentiality Impact: High
Integrity Impact: High Availability Impact: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 8 (hivex)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libguestfs)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libguestfs-winsupport)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libiscsi)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libnbd)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libtpms)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libvirt)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libvirt-dbus)ELSA-2023-69802023-11-18
Oracle Linux version 8 (libvirt-python)ELSA-2023-69802023-11-18
Oracle Linux version 8 (nbdkit)ELSA-2023-69802023-11-18
Oracle Linux version 8 (netcf)ELSA-2023-69802023-11-18
Oracle Linux version 8 (perl-Sys-Virt)ELSA-2023-69802023-11-18
Oracle Linux version 8 (qemu-kvm)ELSA-2023-69802023-11-18
Oracle Linux version 8 (seabios)ELSA-2023-69802023-11-18
Oracle Linux version 8 (sgabios)ELSA-2023-69802023-11-18
Oracle Linux version 8 (supermin)ELSA-2023-69802023-11-18
Oracle Linux version 8 (swtpm)ELSA-2023-69802023-11-18
Oracle Linux version 8 (virt-v2v)ELSA-2023-69802023-11-18
Oracle Linux version 9 (qemu-kvm)ELSA-2022-79672022-11-22



This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team

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