Privilege escalation in QEMU virtio devices

1) Double free

EUVDB-ID: #VU89047

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-3446

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a malicious guest to escalate privileges on the system.

The vulnerability exists due to a boundary error in QEMU virtio devices (virtio-gpu, virtio-serial-bus, virtio-crypto), where the mem_reentrancy_guard flag insufficiently protects against DMA reentrancy issues. A malicious guest can trigger a double free error and execute arbitrary code within the context of the QEMU process on the host.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QEMU: All versions

External links

http://access.redhat.com/security/cve/CVE-2024-3446
http://bugzilla.redhat.com/show_bug.cgi?id=2274211
http://patchew.org/QEMU/20240409105537.18308-1-philmd@linaro.org/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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