Vulnerability identifier: #VU22783

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12068

CWE-ID: CWE-835

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

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

The vulnerability exists due to infinite loop in lsi_execute_script() when reading empty opcode. A local user can consume all available system resources and cause denial of service conditions.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 2.1.0 - 4.1.0

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External links
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00034.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00038.html
http://git.qemu.org/?p=qemu.git;a=commit;h=de594e47659029316bbf9391efb79da0a1a08e08
http://lists.debian.org/debian-lts-announce/2019/09/msg00021.html
http://lists.gnu.org/archive/html/qemu-devel/2019-08/msg01518.html
http://security-tracker.debian.org/tracker/CVE-2019-12068
http://usn.ubuntu.com/4191-2/

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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.