Vulnerabilities > CVE-2023-6683 - NULL Pointer Dereference vulnerability in multiple products

Summary

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.

Vulnerable Configurations

Common Weakness Enumeration (CWE)

• CWE-476 - NULL Pointer Dereference

References