CVE-2023-3354 Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
High 7.5
Published
Updated
Check this codebase for CVE-2023-3354 and fix it if it is affected.
What it is: CVE-2023-3354 is a high-severity vulnerability in Fedoraproject Fedora, published on 11 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-3354 in the wild and no public exploit code.
Affected product: Fedoraproject Fedora. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2023-3354/ (Markdown: https://insights.sbomify.com/CVE-2023-3354/index.md)
A remote unauthenticated attacker can cause a denial of service in the QEMU VNC server by triggering a NULL pointer dereference during TLS handshake cleanup.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-3354?
CVE-2023-3354 is a high-severity vulnerability in Fedoraproject Fedora, published on 11 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-476
Which versions are affected by CVE-2023-3354?
It affects 4 products.
Linux distribution packages (40)
qemu-guest-agent AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-img AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-audio-pa AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-block-curl AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-block-rbd AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-common AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-core AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-device-display-virtio-gpu AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-device-display-virtio-gpu-ccw AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-device-display-virtio-gpu-pci AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-device-display-virtio-vga AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-device-usb-host AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-device-usb-redirect AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-docs AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-tools AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-ui-egl-headless AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-kvm-ui-opengl AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-pr-helper AlmaLinux:9 | All versions | 17:7.2.0-14.el9_2.5.alma.1 |
qemu-guest-agent Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-guest-agent-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-img Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-img-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-audio-pa Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-audio-pa-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-block-curl Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-block-curl-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-block-rbd Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-block-rbd-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-common Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-common-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-core Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-core-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-device-display-virtio-gpu Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-device-display-virtio-gpu-ccw Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-device-display-virtio-gpu-ccw-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
qemu-kvm-device-display-virtio-gpu-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 17:7.2.0-14.el9_2.5 |
Products include Fedoraproject Fedora, Qemu Qemu, Redhat Enterprise Linux, Redhat Openstack Platform.
How do I fix CVE-2023-3354?
Apply the vendor's patch.
Is CVE-2023-3354 being exploited?
There is no known exploitation of CVE-2023-3354 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALSA-2023:5094, AZL-31659, AZL-35171, BELL-CVE-2023-3354, DEBIAN-CVE-2023-3354, GHSA-vhf9-5f69-9hjm and 5 more.