CVE-2023-3354
published 2023-07-11CVE-2023-3354: 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…
PriorityP341high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.61%
75.7th percentile
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.
Affected
24 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | qemu | < qemu 1:7.2+dfsg-7+deb12u2 (bookworm) | qemu 1:7.2+dfsg-7+deb12u2 (bookworm) |
| fedoraproject | fedora | — | — |
| msrc | azl3_qemu_6.2.0-18_on_azure_linux_3.0 | — | — |
| msrc | azl3_qemu_8.2.0-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_qemu_6.2.0-19_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| qemu | qemu | < 8.1.0 | 8.1.0 |
| qemu | qemu | — | — |
| qemu | qemu | >= 0 < 1:5.2+dfsg-11+deb11u3 | 1:5.2+dfsg-11+deb11u3 |
| qemu | qemu | >= 0 < 1:7.2+dfsg-7+deb12u2 | 1:7.2+dfsg-7+deb12u2 |
| qemu | qemu | >= 0 < 1:8.0.4+dfsg-1 | 1:8.0.4+dfsg-1 |
| qemu | qemu | >= 0 < 1:8.0.4+dfsg-1 | 1:8.0.4+dfsg-1 |
| qemu | qemu | >= 0 < 1:4.2-3ubuntu6.28 | 1:4.2-3ubuntu6.28 |
| qemu | qemu | >= 0 < 1:4.2-3ubuntu6.29 | 1:4.2-3ubuntu6.29 |
| qemu | qemu | >= 0 < 1:6.2+dfsg-2ubuntu6.16 | 1:6.2+dfsg-2ubuntu6.16 |
| qemu | qemu | >= 0 < 1:6.2+dfsg-2ubuntu6.21 | 1:6.2+dfsg-2ubuntu6.21 |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| redhat | openstack_platform | — | — |
| ubuntu | qemu | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu3.8LOW
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Ubuntu
QEMU regression
vendor_ubuntu·2026-06-28·CVSS 3.8
CVE-2020-11947 [LOW] QEMU regression
Title: QEMU regression
Summary: USN-8412-1 introduced a regression in QEMU
USN-8412-1 fixed vulnerabilities QEMU. On Ubuntu 20.04 LTS, the fix for
CVE-2024-4467 was incomplete and prevented the creation of boot volumes
from qcow2 images. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause
QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2026-06-09·CVSS 3.8
CVE-2021-3416 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the
iSCSI block driver in QEMU incorrectly handled certain responses from an
iSCSI server. A remote attacker could possibly use this issue to cause QEMU
to crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-1711)
It was discovered that the iSCSI block driver in QEMU incorrectly handled
certain memory operations, leading to a heap-based buffer over-read. An
attacker could possibly use this issue to expose sensitive information from
the host. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-11947)
Ziming Zhang discovered that the SM501 display driver in QEM
Ubuntu
QEMU regression
vendor_ubuntu·2024-06-06·CVSS 3.2
CVE-2023-2861 [LOW] QEMU regression
Title: QEMU regression
Summary: USN-6567-1 introduced a regression in QEMU.
USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too
restrictive and introduced a behaviour change leading to a regression in
certain environments. This update fixes the problem.
Original advisory details:
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code
Ubuntu
QEMU vulnerabilities
vendor_ubuntu·2024-01-08·CVSS 3.2
CVE-2023-1544 [LOW] QEMU vulnerabilities
Title: QEMU vulnerabilities
Summary: Several security issues were fixed in QEMU.
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code and esclate
privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)
It was discovered that QEMU incorrectly handled the Intel HD audio device.
A malicious guest attacker could use this issue to cause QEMU t
Microsoft
Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
vendor_msrc·2023-07-11·CVSS 7.5
CVE-2023-3354 [HIGH] CWE-476 Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
Improper i/o watch removal in tls handshake can lead to remote unauthenticated denial of service
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL
Red Hat
QEMU: VNC: improper I/O watch removal in TLS handshake can lead to remote unauthenticated denial of service
vendor_redhat·2023-06-28·CVSS 7.5
CVE-2023-3354 [HIGH] CWE-476 QEMU: VNC: improper I/O watch removal in TLS handshake can lead to remote unauthenticated denial of service
QEMU: VNC: improper I/O watch removal in TLS handshake can lead to remote unauthenticated denial of service
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.
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 previ
Debian
CVE-2023-3354: qemu - A flaw was found in the QEMU built-in VNC server. When a client connects to the ...
vendor_debian·2023·CVSS 7.5
CVE-2023-3354 [HIGH] CVE-2023-3354: qemu - A flaw was found in the QEMU built-in VNC server. When a client connects to the ...
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.
Scope: local
bookworm: resolved (fixed in 1:7.2+dfsg-7+deb12u2)
bullseye: resolved (fixed in 1:5.2+dfsg-11+deb11u3)
forky: resolved (fixed in 1:8.0.4+dfsg-1)
sid: resolved (fixed in 1:8.0.4+dfsg-1)
trixie: resolved (fixed in 1:8.0.4+dfsg-1)
OSV
qemu regression
osv·2024-06-06·CVSS 3.2
CVE-2023-2861 [LOW] qemu regression
qemu regression
USN-6567-1 fixed vulnerabilities QEMU. The fix for CVE-2023-2861 was too
restrictive and introduced a behaviour change leading to a regression in
certain environments. This update fixes the problem.
Original advisory details:
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code and esclate
privileges. This issue only affected Ubuntu 20.04
OSV
qemu vulnerabilities
osv·2024-01-08·CVSS 3.2
CVE-2020-14394 [LOW] qemu vulnerabilities
qemu vulnerabilities
Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the
USB xHCI controller device. A privileged guest attacker could possibly use
this issue to cause QEMU to crash, leading to a denial of service. This
issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)
It was discovered that QEMU incorrectly handled the TCG Accelerator. A
local attacker could use this issue to cause QEMU to crash, leading to a
denial of service, or possibly execute arbitrary code and esclate
privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)
It was discovered that QEMU incorrectly handled the Intel HD audio device.
A malicious guest attacker could use this issue to cause QEMU to crash,
leading to a denial of service. This issue only affe
OSV
CVE-2023-3354: A flaw was found in the QEMU built-in VNC server
osv·2023-07-11·CVSS 7.5
CVE-2023-3354 [HIGH] CVE-2023-3354: A flaw was found in the QEMU built-in VNC server
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.
GHSA
GHSA-vhf9-5f69-9hjm: A flaw was found in the QEMU built-in VNC server
ghsa_unreviewed·2023-07-11
CVE-2023-3354 [HIGH] CWE-476 GHSA-vhf9-5f69-9hjm: A flaw was found in the QEMU built-in VNC server
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2023-50290 Solr: Host environment variables are published via the Metrics API
bugzilla·2024-01-12·CVSS 6.5
CVE-2023-50290 [MEDIUM] CVE-2023-50290 Solr: Host environment variables are published via the Metrics API
CVE-2023-50290 Solr: Host environment variables are published via the Metrics API
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Solr. The Solr Metrics API publishes all unprotected environment variables available to each Apache Solr instance. Users are able to specify which environment variables to hide, however, the default list is designed to work for known secret Java system properties. Environment variables cannot be strictly defined in Solr, like Java system properties can be, and may be set for the entire host, unlike Java system properties which are set per-Java-proccess.
Discussion:
This issue has been addressed in the following products:
Red Hat Fuse 7.13.0
Via RHSA-2024:3354 https://access.redhat.com/errata/RHSA-2024:3354
Bugzilla
CVE-2023-46749 shiro: path traversal attack may lead to authentication bypass
bugzilla·2024-01-12·CVSS 6.5
CVE-2023-46749 [MEDIUM] CVE-2023-46749 shiro: path traversal attack may lead to authentication bypass
CVE-2023-46749 shiro: path traversal attack may lead to authentication bypass
Apache Shiro before 1.130 or 2.0.0-alpha-4, may be susceptible to a path traversal attack that results in an authentication bypass when used together with path rewriting.
Discussion:
This issue has been addressed in the following products:
Red Hat Fuse 7.13.0
Via RHSA-2024:3354 https://access.redhat.com/errata/RHSA-2024:3354
Bugzilla
CVE-2023-6378 logback: serialization vulnerability in logback receiver
bugzilla·2023-11-30·CVSS 7.5
CVE-2023-6378 [HIGH] CVE-2023-6378 logback: serialization vulnerability in logback receiver
CVE-2023-6378 logback: serialization vulnerability in logback receiver
A serialization vulnerability in logback receiver component part of logback version 1.4.11 allows an attacker to mount a Denial-Of-Service
attack by sending poisoned data.
https://logback.qos.ch/news.html#1.3.12
Discussion:
Created picocli tracking bugs for this issue:
Affects: fedora-all [bug 2252951]
---
This issue has been addressed in the following products:
RHINT Camel-Springboot 4.0.3
Via RHSA-2024:0793 https://access.redhat.com/errata/RHSA-2024:0793
---
This issue has been addressed in the following products:
Red Hat JBoss AMQ
Via RHSA-2024:2945 https://access.redhat.com/errata/RHSA-2024:2945
---
This issue has been addressed in the following products:
Red Hat Fuse 7.13.0
Via RHSA-2024:3354 https
Bugzilla
CVE-2023-34055 spring-boot: org.springframework.boot: spring-boot-actuator class vulnerable to denial of service
bugzilla·2023-11-28·CVSS 6.5
CVE-2023-34055 [MEDIUM] CVE-2023-34055 spring-boot: org.springframework.boot: spring-boot-actuator class vulnerable to denial of service
CVE-2023-34055 spring-boot: org.springframework.boot: spring-boot-actuator class vulnerable to denial of service
In Spring Boot versions 2.7.0 - 2.7.17, 3.0.0-3.0.12 and 3.1.0-3.1.5, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Specifically, an application is vulnerable when all of the following are true:
* the application uses Spring MVC or Spring WebFlux
* org.springframework.boot:spring-boot-actuator is on the classpath
https://spring.io/security/cve-2023-34055
Discussion:
Created log4j tracking bugs for this issue:
Affects: fedora-all [bug 2251918]
---
This issue has been addressed in the following products:
Red Hat Fuse 7.13.0
Via RHSA-2024:3354 https://access.redhat.com/errata/RHSA-2024:3354
https://access.redhat.com/security/cve/CVE-2023-3354https://bugzilla.redhat.com/show_bug.cgi?id=2216478https://lists.debian.org/debian-lts-announce/2024/03/msg00012.htmlhttps://lists.fedoraproject.org/archives/list/[email protected]/message/MURWGXDIF2WTDXV36T6HFJDBL632AO7R/https://access.redhat.com/security/cve/CVE-2023-3354https://bugzilla.redhat.com/show_bug.cgi?id=2216478https://lists.debian.org/debian-lts-announce/2024/03/msg00012.htmlhttps://lists.fedoraproject.org/archives/list/[email protected]/message/MURWGXDIF2WTDXV36T6HFJDBL632AO7R/
2023-07-11
Published