CVE-2023-6683
CVSS 3.1 Score 6.5 of 10 (medium)
Details
Published Jan 12, 2024
Updated: May 22, 2024
CWE ID 476
Summary
CVE-2023-6683 is a vulnerability affecting QEMU's built-in VNC server. The issue lies in the processing of ClientCutText messages where the qemu_clipboard_request() function is reached before the vnc_server_cut_text_caps() call. This sequence of events allows a malicious authenticated VNC client to initiate the clipboard peer before proper initialization, resulting in a NULL pointer dereference. Consequently, QEMU can be crashed, causing a denial of service.
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Affected Products
- QEMU
- Red Hat Enterprise Linux
Affected Vendors
- Qemu
- Red Hat
Advisories, Assessments, and Mitigations
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