CVE-2023-6683
Published: 12 January 2024
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | as of 2024-04-15, the patch has not been committed upstream |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
bionic |
Deferred
(2024-04-15)
|
| focal |
Deferred
(2024-04-15)
|
|
| jammy |
Deferred
(2024-04-15)
|
|
| lunar |
Ignored
(end of life, was deferred [2024-04-15])
|
|
| mantic |
Deferred
(2024-04-15)
|
|
| noble |
Deferred
(2024-04-15)
|
|
| trusty |
Deferred
(2024-04-15)
|
|
| upstream |
Needs triage
|
|
| xenial |
Deferred
(2024-04-15)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |