Privilege escalation in QEMU

1) Buffer overflow

EUVDB-ID: #VU100251

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-2024-26327

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the register_vfs() function in hw/pci/pcie_sriov.c in VF implementations. A malicious guest can trigger memory corruption and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QEMU: 7.1.0 - 8.2.1

CPE2.3

• cpe:2.3:a:qemu:qemu:7.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:qemu:qemu:7.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:qemu:qemu:7.2.1:*:*:*:*:*:*:*

External links

https://lore.kernel.org/all/20240214-reuse-v4-5-89ad093a07f4%40daynix.com/
https://security.netapp.com/advisory/ntap-20240419-0010/

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.