Description
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
Published: 2023-07-11
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-3759-1 qemu security update
EUVD EUVD EUVD-2023-44021 A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
Ubuntu USN Ubuntu USN USN-6567-1 QEMU vulnerabilities
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Fedoraproject Fedora
Qemu Qemu
Redhat Advanced Virtualization Enterprise Linux Openstack Openstack Platform Rhel Aus Rhel E4s Rhel Eus Rhel Tus
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-02-13T16:55:08.379Z

Reserved: 2023-06-21T12:33:29.897Z

Link: CVE-2023-3354

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-07-11T17:15:13.387

Modified: 2024-11-21T08:17:05.117

Link: CVE-2023-3354

cve-icon Redhat

Severity : Important

Publid Date: 2023-06-28T00:00:00Z

Links: CVE-2023-3354 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses