Vulnerability identifier: #VU72299

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-4172

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow within the read_erst_record() and write_erst_record() functions in the ACPI Error Record Serialization Table (ERST) device of QEMU. A malicious guest can overrun the host buffer allocated for the ERST memory device and crash the QEMU process on the host.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

QEMU: 7.0.0

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External links
http://gitlab.com/qemu-project/qemu/-/commit/defb7098
http://gitlab.com/qemu-project/qemu/-/issues/1268
http://lore.kernel.org/qemu-devel/20221024154233.1043347-1-lk@c--e.de/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/
http://security.netapp.com/advisory/ntap-20230127-0013/

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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.

Is there known malware, which exploits this vulnerability?

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