CVE-2023-3354
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 1.6% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.6% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.6% · EPSS, next 30 days
- Weakness
- CWE-476 · NULL pointer dereference
- Record status
- Modified
Affected
- Qemu < 8.1.0
- Qemu 8.1.0
- Redhat Openstack Platform 13.0
- Redhat Enterprise Linux 7.0
- Redhat Enterprise Linux 8.0
- Redhat Enterprise Linux 9.0
- Fedoraproject Fedora 38
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-3354.md and follow it. Check whether this project is affected by CVE-2023-3354. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://bugzilla.redhat.com/show_bug.cgi?id=2216478
- https://bugzilla.redhat.com/show_bug.cgi?id=2216478
References
- https://access.redhat.com/security/cve/CVE-2023-3354
- https://bugzilla.redhat.com/show_bug.cgi?id=2216478
- https://lists.debian.org/debian-lts-announce/2024/03/msg00012.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/MURWGXDIF2WTDXV36T6HFJDBL632AO7R/
- https://access.redhat.com/security/cve/CVE-2023-3354
- https://bugzilla.redhat.com/show_bug.cgi?id=2216478
- https://lists.debian.org/debian-lts-announce/2024/03/msg00012.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/MURWGXDIF2WTDXV36T6HFJDBL632AO7R/