CVE-2023-6683
6.5
MEDIUM
CVSS 3.1
EPSS 0.07%
Description
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.
How to fix CVE-2023-6683
To remediate CVE-2023-6683, upgrade the affected package to a fixed version below.
- —upgrade to 1:7.2+dfsg-7+deb12u4 or later
Is CVE-2023-6683 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:7.2+dfsg-7+deb12u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |