Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | >= 6.1.0, < 8.2.2 |
| Redhat | Enterprise Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2024:2135Third Party Advisory
- https://access.redhat.com/errata/RHSA-2024:2962Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6683Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2254825Issue TrackingPatch
- https://access.redhat.com/errata/RHSA-2024:2135Third Party Advisory
- https://access.redhat.com/errata/RHSA-2024:2962Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6683Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2254825Issue TrackingPatch
- https://security.netapp.com/advisory/ntap-20240223-0001/Third Party Advisory
FAQ
What is CVE-2023-6683?
CVE-2023-6683 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ...
How severe is CVE-2023-6683?
CVE-2023-6683 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-6683?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Redhat Enterprise Linux.