NVD

CVE-2021-3750 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 8.2 HIGH

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 4.6 MEDIUM

Vector: (AV:L/AC:L/Au:N/C:P/I:P/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1999073	Issue Tracking Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/541	Exploit Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/556	Third Party Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://security.netapp.com/advisory/ntap-20220624-0003/	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	NIST Red Hat, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

CVE Modified by Red Hat, Inc. 2/12/2023 6:42:46 PM

Action	Type	Old Value	New Value
Removed	CVSS V3.1	Red Hat, Inc. AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Added	CWE		Red Hat, Inc. CWE-416
Changed	Description	Record truncated, showing 500 of 606 characters. View Entire Change Record 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 se	Record truncated, showing 500 of 652 characters. View Entire Change Record 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 se
Removed	Reference	https://access.redhat.com/errata/RHSA-2022:7967 [No Types Assigned]
Removed	Reference	https://access.redhat.com/security/cve/CVE-2021-3750 [No Types Assigned]

CVE Modified by Red Hat, Inc. 2/02/2023 4:21:34 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		Red Hat, Inc. AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Removed	CWE	Red Hat, Inc. CWE-416
Changed	Description	Record truncated, showing 500 of 652 characters. View Entire Change Record 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 se	Record truncated, showing 500 of 606 characters. View Entire Change Record 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 se
Added	Reference		https://access.redhat.com/errata/RHSA-2022:7967 [No Types Assigned]
Added	Reference		https://access.redhat.com/security/cve/CVE-2021-3750 [No Types Assigned]

Initial Analysis by NIST 5/16/2022 2:14:14 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR cpe:2.3:a:qemu:qemu::::::::* versions up to (excluding) 7.0.0
Added	CPE Configuration		OR cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::* cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::*
Added	CVSS V2		NIST (AV:L/AC:L/Au:N/C:P/I:P/A:P)
Added	CVSS V3.1		NIST AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Added	CWE		NIST CWE-416
Changed	Reference Type	https://bugzilla.redhat.com/show_bug.cgi?id=1999073 No Types Assigned	https://bugzilla.redhat.com/show_bug.cgi?id=1999073 Issue Tracking, Third Party Advisory
Changed	Reference Type	https://gitlab.com/qemu-project/qemu/-/issues/541 No Types Assigned	https://gitlab.com/qemu-project/qemu/-/issues/541 Exploit, Third Party Advisory
Changed	Reference Type	https://gitlab.com/qemu-project/qemu/-/issues/556 No Types Assigned	https://gitlab.com/qemu-project/qemu/-/issues/556 Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-3750
NVD Published Date:
05/02/2022
NVD Last Modified:
02/12/2023
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-3750 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by Red Hat, Inc. 5/14/2024 5:25:10 AM

CVE Modified by Red Hat, Inc. 2/12/2023 6:42:46 PM

CVE Modified by Red Hat, Inc. 2/02/2023 4:21:34 PM

Modified Analysis by NIST 10/25/2022 4:06:12 PM

CVE Modified by Red Hat, Inc. 8/15/2022 7:15:28 AM

CVE Modified by Red Hat, Inc. 6/24/2022 12:15:08 PM

Initial Analysis by NIST 5/16/2022 2:14:14 PM

Quick Info