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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 (10)

Product Vendor Version
Fedora Fedora n/a
Extra Packages for Enterprise Linux Fedora 1.9.27
Red Hat Enterprise Linux 6 Red Hat Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.
Red Hat Enterprise Linux 7 Red Hat 70c80b940abbafb0d631870322b5f7c8e306a2063097493ab471f0ba8ddd228b
Red Hat Enterprise Linux 9 Red Hat 1.9.25
Red Hat Enterprise Linux 7 Red Hat 1.15.4
Red Hat OpenStack Platform 13 (Queens) Red Hat 1.15.1
Red Hat Enterprise Linux 8 Advanced Virtualization Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat 092c46188af77b69b4c19e349712a23244ec7cdc885c2e0150a8209c1693c95a
qemu n/a 1.15.4

References (8)

Credits (1)