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.

CVSS v3.0 8.2 HIGH
CVSS v2.0 4.6 MEDIUM

8.2^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.5 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

4.6^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

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

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Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	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 12:15

Updated : 2023-02-12 15:42

NVD link : CVE-2021-3750

Mitre link : CVE-2021-3750

JSON object : View

CWE

CWE-416

Use After Free

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Products Affected

redhat

enterprise_linux

qemu

qemu

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