HTTP response splitting in Apache HTTP Server - CVE-2023-38709

Vulnerability identifier: #VU88151

CSH Severity: Medium

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

CVE-ID: CVE-2023-38709

CWE-ID: CWE-113

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
Apache HTTP Server
HP-UX Apache Web Server
IBM HTTP Server
Debian Linux
Oracle Linux
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
Amazon Linux AMI
Gentoo Linux
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 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 Server 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
F5OS
SUSE Enterprise Storage
IBM i
Red Hat Enterprise Linux for Power, little endian
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
macOS
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
Server Applications Module
SUSE Package Hub 15
Basesystem Module
openSUSE Leap
openEuler
Fedora
CyberSense OS
Oracle Solaris
IBM Rational ClearCase
IBM Business Automation Workflow
WebSphere Remote Server
IBM Rational ClearQuest
Red Hat OpenShift Dev Spaces
EasyApache
OpenShift Logging
Dell Secure Connect Gateway
IBM Tivoli Monitoring
IBM Rational Build Forge
IBM Power Hardware Management Console (HMC)
EMC NetWorker Server
DataPower Operations Dashboard
IBM Tivoli Netcool Configuration Manager
Dell EMC OpenManage Enterprise Modular
IBM Aspera Console
IBM Cloud Pak for Watson AIOps
NetWorker Management Console (NMC)
IBM Cloud Pak System
Traffix SDC
IBM Cloud Pak for Multicloud Management
BIG-IP
PowerScale OneFS
apache2 (Ubuntu package)
jbcs-httpd24-mod_proxy_cluster (Red Hat package)
mod_http2
jbcs-httpd24-mod_http2 (Red Hat package)
mod_md
jbcs-httpd24-mod_md (Red Hat package)
mod_proxy_html
mod_session
mod_ssl
mod_ldap
httpd-tools
httpd-devel
httpd
httpd-filesystem
httpd-manual
httpd-debuginfo
httpd-debugsource
httpd-help
apache2-tls13-worker
apache2-tls13-prefork
apache2-tls13-example-pages
apache2
apache2-tls13-prefork-debuginfo
apache2-tls13
apache2-prefork-debuginfo
apache2-utils-debuginfo
apache2-example-pages
apache2-worker-debuginfo
apache2-worker
apache2-utils
apache2-debuginfo
apache2-debugsource
apache2-tls13-debuginfo
apache2-devel
apache2-tls13-debugsource
apache2-tls13-devel
apache2-tls13-utils-debuginfo
apache2-tls13-worker-debuginfo
apache2-prefork
apache2-doc
apache2-tls13-doc
apache2-tls13-utils
jbcs-httpd24-httpd (Red Hat package)
apache2-manual
apache2-utils-debugsource
apache2-event-debuginfo
apache2-worker-debugsource
apache2-prefork-debugsource
apache2-event-debugsource
apache2-event
apache2 (Debian package)
www-servers/apache
httpd (Red Hat package)
httpd-doc
httpd-core
mod_lua
jbcs-httpd24-mod_security (Red Hat package)
JBoss Core Services

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not correctly process CRLF character sequences. A malicious or exploitable backend/content generators can send specially crafted response containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Install updates from vendor's website.

• https://downloads.apache.org/httpd/CHANGES_2.4
• https://httpd.apache.org/security/vulnerabilities_24.html