CVE-2021-3750

 

Published at: - 02-05-2022 09:15

Last modified: - 25-10-2022 10:06

Total changes: - 8

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://gitlab.com/qemu-project/qemu/-/issues/556
• https://bugzilla.redhat.com/show_bug.cgi?id=1999073
• https://gitlab.com/qemu-project/qemu/-/issues/541
• https://security.netapp.com/advisory/ntap-20220624-0003/
• GLSA-202208-27-Third Party Advisory

 

Keywords

NVD

 

CVE-2021-3750

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures