CVE details
CVE-2023-3354
A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service.
Affected ports (2)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| emulators/qemu-cheri | qemu-cheri | 0.d20260108 | unaddressed | brooks@FreeBSD.org |
| emulators/qemu-user-static | qemu-user-static | 3.1.0_16 | unaddressed | emulation@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>qemu-cheri</name>
<range><lt>8.1.0</lt></range>
</package>
<package>
<name>qemu-user-static</name>
<range><lt>8.1.0</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>A flaw was found in the QEMU built-in VNC server. When a client
connects to the VNC server, QEMU checks whether the current number of
connections crosses a certain threshold and if so, cleans up the
previous connection. If the previous connection happens to be in the
handshake phase and fails, QEMU cleans up the connection again,
resulting in a NULL pointer dereference issue. This could allow a
remote unauthenticated client to cause a denial of service.</p>
</body>
</description>
<references>
<cvename>CVE-2023-3354</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2023-3354</url>
</references>
<dates>
<discovery>2023-07-11</discovery>
<entry>2026-10-25</entry>
</dates>
</vuln>