CVE-2023-3354

Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 11 Jul 2023, 16:16
Last modified:13 Feb 2025, 16:55

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.13% LOW
0% probability +0.06%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Jul 2023, 16:16
Published
Vulnerability first disclosed
13 Feb 2025, 16:55
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.13%• Percentile: 31%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • fedoraproject•fedora

    38

  • qemu•qemu

    < 8.1.0 | 8.1.0:rc0 | 8.1.0:rc1

  • redhat•enterprise_linux

    7.0 | 8.0 | 9.0

  • redhat•openstack_platform

    13.0

References (4)