NULL pointer dereference in Libxml2 - CVE-2021-3537

Vulnerability identifier: #VU54223

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-3537

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Libxml2
HPE B-series SN6750B Fibre Channel Switch
HPE B-series SN6700B Fibre Channel Switch
HPE B-series SN6650B Fibre Channel Switch
HPE B-series SN6600B Fibre Channel Switch
HPE B-series SN4700B SAN Extension Switch
HPE B-series SN3600B Fibre Channel Switch
HPE B-series SN2600B SAN Extension Switch
HPE SN8600B 8-slot SAN Director Switch
HPE SN8600B 4-slot SAN Director Switch
HPE SN8700B 8-slot SAN Director Switch
HPE SN8700B 4-slot SAN Director Switch
Brocade 32Gb Fibre Channel SAN Switch for HPE Synergy
IBM Flex System CN4093 10Gb Converged Scalable Switch
IBM Flex System EN2092 1Gb Ethernet Scalable Switch
IBM Flex System Fabric SI4093 GbFSIM 10Gb Scalable Switch
Amazon Linux AMI
Gentoo Linux
SUSE MicroOS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Anolis OS
HPE Helion Openstack
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
SUSE Linux Enterprise Point of Sale
SUSE Linux Enterprise Debuginfo
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Software Development Kit
Ubuntu
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Python2
openEuler
Fedora
Brocade Fabric OS
cflinuxfs3
APM Edge
Flex System Fabric EN4093/EN4093R 10Gb Scalable Switch
jbcs-httpd24-openssl-pkcs11 (Red Hat package)
jbcs-httpd24-openssl-chil (Red Hat package)
jbcs-httpd24-apr-util (Red Hat package)
jbcs-httpd24-mod_http2 (Red Hat package)
jbcs-httpd24-nghttp2 (Red Hat package)
jbcs-httpd24-mod_md (Red Hat package)
jbcs-httpd24-httpd (Red Hat package)
jbcs-httpd24-mod_security (Red Hat package)
jbcs-httpd24-curl (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
libxml2-debugsource
libxml2-python-debuginfo
libxml2-debuginfo
libxml2-python-debugsource
libxml2-32bit
libxml2-python
libxml2
libxml2-doc
libxml2 (Ubuntu package)
libxml2-utils (Ubuntu package)
libxml2-devel
python-libxml2-debugsource
python-libxml2-debuginfo
python-libxml2
libxml2-tools-debuginfo
libxml2-tools
libxml2-2-debuginfo-32bit
libxml2-2-debuginfo
libxml2-2-32bit
libxml2-2
libxml2-2-32bit-debuginfo
python3-libxml2-python-debuginfo
python3-libxml2-python
python2-libxml2-python-debuginfo
python2-libxml2-python
python-libxml2-python-debugsource
libxml2 (Red Hat package)
python3-libxml2
python2-libxml2
libxml2-help
Migration Toolkit for Containers
Service Telemetry Framework
Oracle HTTP Server
Cloud Pak for Security (CP4S)
Red Hat OpenShift Jaeger
JBoss Core Services
IBM Security Verify Access
Web Terminal
OpenShift Virtualization
SecurID Authentication Manager

Install updates from vendor's website.

Libxml2 - update to 2.9.11
cflinuxfs3 - update to 0.245.0
jbcs-httpd24-openssl-pkcs11 (Red Hat package) - addressed in versions 0.4.10-26.el8jbcs, 0.4.10-26.jbcs.el7
APM Edge - update to 4.0
jbcs-httpd24-openssl-chil (Red Hat package) - addressed in versions 1.0.0-11.el8jbcs, 1.0.0-11.jbcs.el7
Migration Toolkit for Containers - addressed in versions 1.4.6, 1.5.1
jbcs-httpd24-apr-util (Red Hat package) - addressed in versions 1.6.1-91.el8jbcs, 1.6.1-91.jbcs.el7
Cloud Pak for Security (CP4S) - update to 1.8.0.0
jbcs-httpd24-mod_http2 (Red Hat package) - addressed in versions 1.15.7-22.el8jbcs, 1.15.7-22.jbcs.el7
Red Hat OpenShift Jaeger - addressed in versions 1.20.5, 1.24.0
jbcs-httpd24-nghttp2 (Red Hat package) - addressed in versions 1.39.2-41.el8jbcs, 1.39.2-41.jbcs.el7
jbcs-httpd24-mod_md (Red Hat package) - addressed in versions 2.0.8-41.el8jbcs, 2.0.8-41.jbcs.el7
JBoss Core Services - update to 2.4.37 SP11
jbcs-httpd24-httpd (Red Hat package) - addressed in versions 2.4.37-80.el8jbcs, 2.4.37-80.jbcs.el7
jbcs-httpd24-mod_security (Red Hat package) - addressed in versions 2.9.2-68.GA.el8jbcs, 2.9.2-68.GA.jbcs.el7
jbcs-httpd24-curl (Red Hat package) - addressed in versions 7.78.0-3.el8jbcs, 7.78.0-3.jbcs.el7
Web Terminal - update to 1.3
OpenShift Virtualization - addressed in versions 2.6.6, 4.8.0, 4.8.1
libxml2-debugsource - addressed in versions 2.7.6-0.77.36.1, 2.9.4-46.43.1, 2.9.7-3.34.1
libxml2-python-debuginfo - update to 2.7.6-0.77.36.1
libxml2-debuginfo - update to 2.7.6-0.77.36.1
libxml2-python-debugsource - update to 2.7.6-0.77.36.1
libxml2-32bit - update to 2.7.6-0.77.36.1
libxml2-python - update to 2.7.6-0.77.36.1
libxml2 - update to 2.7.6-0.77.36.1
libxml2-doc - addressed in versions 2.7.6-0.77.36.1, 2.9.4-46.43.1
libxml2 - update to 2.9.1-6.6.42
libxml2 (Ubuntu package) - addressed in versions 2.9.4+dfsg1-6.1ubuntu1.4, 2.9.10+dfsg-6.3ubuntu0.1, 2.9.10+dfsg-5ubuntu0.20.04.1, 2.9.10+dfsg-5ubuntu0.20.10.2
libxml2-utils (Ubuntu package) - addressed in versions 2.9.4+dfsg1-6.1ubuntu1.4, 2.9.10+dfsg-6.3ubuntu0.1, 2.9.10+dfsg-5ubuntu0.20.04.1, 2.9.10+dfsg-5ubuntu0.20.10.2
libxml2-devel - addressed in versions 2.9.4-46.43.1, 2.9.7-3.34.1
python-libxml2-debugsource - update to 2.9.4-46.43.1
python-libxml2-debuginfo - update to 2.9.4-46.43.1
python-libxml2 - update to 2.9.4-46.43.1
libxml2-tools-debuginfo - addressed in versions 2.9.4-46.43.1, 2.9.7-3.34.1
libxml2-tools - addressed in versions 2.9.4-46.43.1, 2.9.7-3.34.1
libxml2-2-debuginfo-32bit - update to 2.9.4-46.43.1
libxml2-2-debuginfo - addressed in versions 2.9.4-46.43.1, 2.9.7-3.34.1
libxml2-2-32bit - addressed in versions 2.9.4-46.43.1, 2.9.7-3.34.1
libxml2-2 - addressed in versions 2.9.4-46.43.1, 2.9.7-3.34.1
libxml2-2-32bit-debuginfo - update to 2.9.7-3.34.1
python3-libxml2-python-debuginfo - update to 2.9.7-3.34.1
python3-libxml2-python - update to 2.9.7-3.34.1
python2-libxml2-python-debuginfo - update to 2.9.7-3.34.1
python2-libxml2-python - update to 2.9.7-3.34.1
python-libxml2-python-debugsource - update to 2.9.7-3.34.1
libxml2 (Red Hat package) - update to 2.9.7-9.el8_4.2
libxml2-devel - update to 2.9.7-9.0.1
libxml2 - update to 2.9.7-9.0.1
python3-libxml2 - update to 2.9.7-9.0.1
libxml2 - addressed in versions 2.9.10-12.fc34, 2.9.12-4.fc33
libxml2-debugsource - update to 2.9.10-16
libxml2-debuginfo - update to 2.9.10-16
libxml2-devel - update to 2.9.10-16
python2-libxml2 - update to 2.9.10-16
python3-libxml2 - update to 2.9.10-16
libxml2-help - update to 2.9.10-16
libxml2 - update to 2.9.10-16
IBM Flex System CN4093 10Gb Converged Scalable Switch - update to 7.8.31.0
Flex System Fabric EN4093/EN4093R 10Gb Scalable Switch - update to 7.8.31.0
IBM Flex System EN2092 1Gb Ethernet Scalable Switch - update to 7.8.31.0
IBM Flex System Fabric SI4093 GbFSIM 10Gb Scalable Switch - update to 7.8.31.0
SecurID Authentication Manager - update to 8.5 Patch 5
Brocade Fabric OS - addressed in versions 9.1.1d2, 9.2.0b1, 9.2.1

• https://bugzilla.redhat.com/show_bug.cgi?id=1956522
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
• https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/

• Multiple vulnerabilities in Libxml2
• Multiple vulnerabilities in cflinuxfs3
• Red Hat Enterprise Linux 8.4 update for libxml2
• Gentoo update for libxml2
• Multiple vulnerabilities in Red Hat OpenShift Jaeger
• Multiple vulnerabilities in Red Hat Migration Toolkit for Containers
• Multiple vulnerabilities in Red Hat OpenShift Jaeger
• Multiple vulnerabilities in Red Hat Migration Toolkit for Containers
• Multiple vulnerabilities in Red Hat Web Terminal
• Multiple vulnerabilities in Hitachi Energy APM Edge
• Multiple vulnerabilities in IBM Security Verify Access
• Multiple vulnerabilities in Red Hat JBoss Core Services
• SUSE update for libxml2
• SUSE update for libxml2
• SUSE update for libxml2
• Ubuntu update for libxml2
• Multiple vulnerabilities in Red Hat Service Telemetry Framework
• Multiple vulnerabilities in IBM Cloud Pak for Security
• Multiple vulnerabilities in Oracle HTTP Server
• Amazon Linux AMI update for libxml2
• openEuler 20.03 LTS SP1 update for libxml2
• Multiple vulnerabilities in HPE Brocade Fabric OS
• Multiple vulnerabilities in OpenShift Virtualization 4.8
• Multiple vulnerabilities in OpenShift Virtualization 2.6
• Multiple vulnerabilities in OpenShift Virtualization 4.8
• Fedora 34 update for libxml2
• Fedora 33 update for libxml2
• Anolis OS update for libxml2
• SecurID Authentication Manager update for third-party components
• Multiple vulnerabilities in IBM Flex System switch firmware products