Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2023-3354

NULL Pointer Dereference

Published: Jul 11, 2023 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
LOW
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2023-3354
CWEhttps://cwe.mitre.org/data/definitions/476.html

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

The product dereferences a pointer that it expects to be valid but is NULL.

Affected Software

NameVendorStart VersionEnd Version
QemuQemu*8.1.0 (excluding)
QemuQemu8.1.0-rc0 (including)8.1.0-rc0 (including)
QemuQemu8.1.0-rc1 (including)8.1.0-rc1 (including)
Red Hat Enterprise Linux 8RedHatvirt-devel:rhel-8080020230901075317.63b34585*
Red Hat Enterprise Linux 8RedHatvirt:rhel-8080020230901075317.63b34585*
Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsRedHatvirt:rhel-8010020230902123217.c27ad7f8*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatvirt:rhel-8020020230902114249.4cda2c84*
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRedHatvirt:rhel-8020020230902114249.4cda2c84*
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRedHatvirt:rhel-8020020230902114249.4cda2c84*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatvirt:rhel-8040020230902084954.522a0ee4*
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRedHatvirt:rhel-8040020230902084954.522a0ee4*
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRedHatvirt:rhel-8040020230902084954.522a0ee4*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatvirt-devel:rhel-8060020231128234847.ad008a3a*
Red Hat Enterprise Linux 8.6 Extended Update SupportRedHatvirt:rhel-8060020231128234847.ad008a3a*
Red Hat Enterprise Linux 9RedHatqemu-kvm-17:7.2.0-14.el9_2.5*
Red Hat Enterprise Linux 9.0 Extended Update SupportRedHatqemu-kvm-17:6.2.0-11.el9_0.8*
QemuUbuntubionic*
QemuUbuntuesm-infra-legacy/trusty*
QemuUbuntuesm-infra/bionic*
QemuUbuntuesm-infra/focal*
QemuUbuntuesm-infra/xenial*
QemuUbuntufocal*
QemuUbuntujammy*
QemuUbuntukinetic*
QemuUbuntulunar*
QemuUbuntutrusty*
QemuUbuntutrusty/esm*
QemuUbuntuxenial*

Potential Mitigations

References

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