CVE Vulnerability

CVE-2021-3750

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.

4.6 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.2 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.5 / Impact : 6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://gitlab.com/qemu-project/qemu/-/issues/556 Third Party Advisory
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://security.netapp.com/advisory/ntap-20220624-0003/ Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
Information

Published : 2022-05-02 07:15

Updated : 2023-02-12 11:42

NVD link : CVE-2021-3750

Mitre link : CVE-2021-3750

Products Affected
No products.
CWE
CWE-416