NULL Pointer Dereference Affecting virt:rhel/libvirt-daemon package, versions <0:8.0.0-23.module+el8.10.0+21023+5962ee04


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-7064048
  • published23 May 2024
  • disclosed12 Jan 2024

Introduced: 12 Jan 2024

CVE-2023-6683  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/libvirt-daemon to version 0:8.0.0-23.module+el8.10.0+21023+5962ee04 or higher.
This issue was patched in RHSA-2024:2962.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/libvirt-daemon package and not the virt:rhel/libvirt-daemon package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.

CVSS Scores

version 3.1