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CVE-2023-3354

Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service

Published: 7/11/2023 Last updated: 2/13/2025 Reserved: 6/21/2023

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 7.5 High CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Opam packages affected (2)

conf-qemu-img nbd-tool

Products affected (15)

Product Vendor Version
Fedora Fedora <= *
Fedora Fedora 4.5.0.1.1
Extra Packages for Enterprise Linux Fedora 4.5.0.1.3
Red Hat Enterprise Linux 6 Red Hat <= <= 1.0.0
Red Hat Enterprise Linux 7 Red Hat <= <= 2.4.1
Red Hat Enterprise Linux 7 Red Hat <= 5.15.*
Red Hat Enterprise Linux 9 Red Hat <= 5.18.*
Red Hat Enterprise Linux 9 Red Hat 4.4.0.3.0
Red Hat Enterprise Linux 7 Red Hat <= 6.0.4
Red Hat OpenStack Platform 13 (Queens) Red Hat 4.5.0.0.0
Red Hat Enterprise Linux 8 Advanced Virtualization Red Hat 7.3.6.870
Red Hat Enterprise Linux 8 Red Hat <= 5.17.*
Red Hat Enterprise Linux 8 Red Hat <= <= 1.7.7
qemu n/a <= <= 1.5.8
qemu n/a <= 5.10.*

References (16)

Credits (2)