Input validation error in Apache HTTP Server - CVE-2024-38473

Vulnerability identifier: #VU93540

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green

CVE-ID: CVE-2024-38473

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Affected software:
Apache HTTP Server
HP-UX Apache Web Server
IBM HTTP Server
Gentoo Linux
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Enterprise Storage
IBM i
Anolis OS
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
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 for ARM 64 - Extended Update Support
Ubuntu
Slackware Linux
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
SUSE Linux Enterprise Server 15 SP4 LTSS
Basesystem Module
Server Applications Module
SUSE Package Hub 15
openSUSE Leap
openEuler
Fedora
CyberSense OS
IBM Business Automation Workflow
EasyApache
IBM Cloud Object Storage Systems
IBM Tivoli Monitoring
IBM Rational Build Forge
IBM Power Hardware Management Console (HMC)
EMC NetWorker Server
IBM Cloud Pak System
Traffix SDC
IBM Cloud Pak for Multicloud Management
Red Hat OpenShift Container Platform
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
jbcs-httpd24-mod_proxy_cluster (Red Hat package)
mod_http2
jbcs-httpd24-mod_http2 (Red Hat package)
mod_md
apache2 (Ubuntu package)
jbcs-httpd24-mod_md (Red Hat package)
mod_ldap
mod_ssl
httpd-filesystem
httpd-manual
httpd
httpd-devel
mod_session
mod_proxy_html
httpd-tools
apache2-prefork-debuginfo
apache2-utils-debuginfo
apache2-example-pages
apache2
apache2-worker-debuginfo
apache2-worker
apache2-utils
apache2-prefork
apache2-devel
apache2-debugsource
apache2-debuginfo
apache2-doc
apache2-tls13-worker
apache2-tls13-utils-debuginfo
apache2-tls13
apache2-tls13-example-pages
apache2-tls13-doc
apache2-tls13-utils
apache2-tls13-prefork-debuginfo
apache2-tls13-prefork
apache2-tls13-worker-debuginfo
apache2-tls13-devel
apache2-tls13-debuginfo
apache2-tls13-debugsource
apache2-event
apache2-event-debuginfo
httpd (Red Hat package)
jbcs-httpd24-httpd (Red Hat package)
httpd-help
httpd-debugsource
httpd-debuginfo
apache2-prefork-debugsource
apache2-worker-debugsource
apache2-utils-debugsource
apache2-event-debugsource
apache2-manual
apache2 (Debian package)
www-servers/apache
httpd-core
mod_lua
httpd-doc
jbcs-httpd24-mod_security (Red Hat package)
BIG-IP
SecurityCenter
DataPower Operations Dashboard
Dell EMC OpenManage Enterprise Modular
IBM Aspera Console
IBM Cloud Pak for Watson AIOps
NetWorker Management Console (NMC)
Planning Analytics Local
JBoss Core Services

The vulnerability allows a remote attacker to bypass authentication.

The vulnerability exists due to insufficient validation of user-supplied input when handling incorrect encoding in mod_proxy. A remote attacker can force the web server to pass request URLs with incorrect encoding to backend services.

Install updates from vendor's website.

• https://lists.apache.org/thread/mcvg3lvl7jb8j539mmzxdg1fvn2nnnq8