Vulnerability identifier: #VU69353

Vulnerability risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3750

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the USB EHCI controller emulation of QEMU. A remote guest can trigger a use-after-free error and execute arbitrary code on the host OS.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

QEMU: 6.0.0 - 6.2.0 rc2

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External links
http://gitlab.com/qemu-project/qemu/-/issues/556
http://bugzilla.redhat.com/show_bug.cgi?id=1999073
http://gitlab.com/qemu-project/qemu/-/issues/541
http://security.netapp.com/advisory/ntap-20220624-0003/
http://security.gentoo.org/glsa/202208-27

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.