#VU71136 Out-of-bounds read in QEMU - CVE-2022-4144

Vulnerability identifier: #VU71136

Vulnerability risk: Medium

CVSSv4.0: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-4144

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

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

The vulnerability exists due to a boundary condition within the qxl_phys2virt() function in the QXL display device emulation in QEMU. A malicious guest user can trigger an out-of-bounds read error and crash the QEMU process on the host

Mitigation
Install updates from vendor's website.

Vulnerable software versions

QEMU: All versions

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2148506
https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg04143.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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