Privilege escalation in QEMU

1) Out-of-bounds write

EUVDB-ID: #VU75178

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-2962

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the Tulip device emulation in QEMU. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges on the host OS.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QEMU: All versions

CPE2.3

• cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

External links

https://gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4ca109182
https://gitlab.com/qemu-project/qemu/-/issues/1171

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.