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Fencer Vulns
high 7.5

CVE-2024-42516 json

Apache HTTP Server: HTTP response splitting

published 2025-07-10 15 mo ago modified 2026-09-08 2 mo ago also BIT-apache-2024-42516 , EUVD-2024-54775

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response.

This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did not address the issue.

Users are recommended to upgrade to version 2.4.64, which fixes this issue.

Patch / fix

  • bitnami apache 2.4.64
  • apache http_server 2.4.64
  • apache2 Debian 12 2.4.65-1~deb12u1
  • apache2 Debian 14, Debian 13 2.4.64-1

debian advisories DEBIAN-CVE-2024-42516

  • apache2 Ubuntu 22.04 LTS 2.4.52-1ubuntu4.15
  • apache2 Ubuntu 24.04 LTS 2.4.58-1ubuntu8.7
  • apache2 Ubuntu 25.10 2.4.64-1ubuntu2
  • apache2 Ubuntu Pro 14.04 LTS 2.4.7-1ubuntu4.22+esm12
  • apache2 Ubuntu Pro 16.04 LTS 2.4.18-2ubuntu3.17+esm16
  • apache2 Ubuntu Pro 18.04 LTS 2.4.29-1ubuntu4.27+esm6
  • apache2 Ubuntu Pro 20.04 LTS 2.4.41-4ubuntu3.23+esm2

ubuntu advisories UBUNTU-CVE-2024-42516

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • jbcs-httpd24-httpd jboss core services 1 2.4.62-16.el8jbcs
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.62-16.el8jbcs
  • jbcs-httpd24-mod_ldap jboss core services 1 2.4.62-16.el8jbcs
  • jbcs-httpd24-mod_http2 jboss core services 1 2.0.29-13.el8jbcs
  • jbcs-httpd24-httpd-tools jboss core services 1 2.4.62-16.el8jbcs
  • jbcs-httpd24-mod_session jboss core services 1 2.4.62-16.el8jbcs
  • jbcs-httpd24-httpd-manual jboss core services 1 2.4.62-16.el8jbcs
  • jbcs-httpd24-httpd-selinux jboss core services 1 2.4.62-16.el8jbcs

red hat advisories RHSA-2026:67152RHSA-2026:66323RHSA-2026:62165RHSA-2026:56868RHSA-2026:47046RHSA-2026:42828

  • apache2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 2.4.66-150400.6.57.1
  • apache2 SLE Module for Basesystem 15 SP7 2.4.62-150700.4.3.1
  • apache2-event SLE Module for Package Hub 15 SP7 2.4.62-150700.4.3.1
  • apache2-utils SLE Module for Server Applications 15 SP7 2.4.62-150700.4.3.1
  • apache2-worker SLE Module for Server Applications 15 SP7 2.4.62-150700.4.3.1
  • apache2-prefork SLE Module for Basesystem 15 SP7 2.4.62-150700.4.3.1
  • apache2 SLE Module for Package Hub 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.35.1
  • apache2-event SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.35.1

suse advisories SUSE-SU-2026:2686-1SUSE-SU-2025:02685-1SUSE-SU-2025:02684-1SUSE-SU-2025:02683-1SUSE-SU-2025:02682-1SUSE-SU-2025:02565-1

  • apache2 openSUSE Tumbleweed 2.4.64-1.1

opensuse advisories openSUSE-SU-2025:15360-1

  • httpd AlmaLinux 8 2.4.37-65.module_el8.10.0+4233+8b7d9181.9
  • mod_md AlmaLinux 8 1:2.0.8-8.module_el8.10.0+4088+57f011c1.2
  • mod_ssl AlmaLinux 8 1:2.4.37-65.module_el8.10.0+4233+8b7d9181.9
  • mod_ldap AlmaLinux 8 2.4.37-65.module_el8.10.0+4233+8b7d9181.9
  • mod_http2 AlmaLinux 8 1.15.7-10.module_el8.10.0+4233+8b7d9181.7
  • httpd-tools AlmaLinux 8 2.4.37-65.module_el8.10.0+4233+8b7d9181.9
  • mod_session AlmaLinux 8 2.4.37-65.module_el8.10.0+4233+8b7d9181.9
  • httpd-manual AlmaLinux 8 2.4.37-65.module_el8.10.0+4233+8b7d9181.9

almalinux advisories ALSA-2026:42828ALSA-2026:41906ALSA-2026:34109

  • httpd Rocky Linux 9 2.4.62-13.el9_8.5
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+1984+1bed3124.4
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+1938+3b7755d4.3
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+40045+6ce8579b.6
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+40206+be2c8a50.8
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+40053+5a18018e.7
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+1830+22f0c9e0
  • httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+1842+4a9649e8.2

rocky linux advisories RLSA-2026:41906RLSA-2026:42828RLSA-2026:34109

  • apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 2.4.64-r0

alpine advisories ALPINE-CVE-2024-42516

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • httpd CBL-Mariner 2.0, Azure Linux 3.0 2.4.64-1

azure linux advisories AZL-65166AZL-65214

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-42516 updated cvss 6.8

httpd: incomplete fix for CVE-2023-38709

  • Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) mod_md 2.0.8-8.module+el8.10.0+23815+1b5e1c66.2, httpd 2.4.37-65.module+el8.10.0+24521+219dcfc5.9, mod_ssl 2.4.37-65.module+el8.10.0+24521+219dcfc5.9, mod_ldap 2.4.37-65.module+el8.10.0+24521+219dcfc5.9, mod_http2 1.15.7-10.module+el8.10.0+24521+219dcfc5.7, httpd-tools 2.4.37-65.module+el8.10.0+24521+219dcfc5.9, +4 more
    fixed: vendor fix RHSA-2026:42828
  • Red Hat Enterprise Linux AppStream (v. 9) httpd 2.4.62-13.el9_8.5, mod_lua 2.4.62-13.el9_8.5, mod_ssl 2.4.62-13.el9_8.5, mod_ldap 2.4.62-13.el9_8.5, httpd-core 2.4.62-13.el9_8.5, httpd-tools 2.4.62-13.el9_8.5, +4 more
    fixed: vendor fix RHSA-2026:41906
  • Red Hat Enterprise Linux AppStream (v. 10) httpd 2.4.63-13.el10_2.4, mod_lua 2.4.63-13.el10_2.4, mod_ssl 2.4.63-13.el10_2.4, mod_ldap 2.4.63-13.el10_2.4, httpd-core 2.4.63-13.el10_2.4, httpd-tools 2.4.63-13.el10_2.4, +4 more
    fixed: vendor fix RHSA-2026:34109
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) httpd 2.4.53-11.el9_2.15, httpd-core 2.4.53-11.el9_2.15
    fixed: vendor fix RHSA-2026:67152
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) httpd 2.4.57-11.el9_4.5, httpd-core 2.4.57-11.el9_4.5
    fixed: vendor fix RHSA-2026:66323
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) httpd 2.4.63-1.el10_0.4, mod_lua 2.4.63-1.el10_0.4, mod_ssl 2.4.63-1.el10_0.4, mod_ldap 2.4.63-1.el10_0.4, httpd-core 2.4.63-1.el10_0.4, httpd-tools 2.4.63-1.el10_0.4, +4 more
    fixed: vendor fix RHSA-2026:47046
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) httpd 2.4.62-4.el9_6.6, mod_lua 2.4.62-4.el9_6.6, mod_ssl 2.4.62-4.el9_6.6, mod_ldap 2.4.62-4.el9_6.6, httpd-core 2.4.62-4.el9_6.6, httpd-tools 2.4.62-4.el9_6.6, +4 more
    fixed: vendor fix RHSA-2026:62165
show 5 more
  • Red Hat Enterprise Linux Server (v. 7 ELS) httpd 2.4.6-99.el7_9.8 Red Hat Enterprise Linux Server Optional (v. 7 ELS) httpd-debuginfo 2.4.6-99.el7_9.8
    fixed: vendor fix RHSA-2026:92590
  • Red Hat Insights proxy 1.5 insights-proxy/insights-proxy-container-rhel9 1786433656
    fixed: vendor fix RHSA-2026:53371
  • Red Hat JBoss Core Services 2.4.62.SP5
    fixed: vendor fix RHSA-2026:56869
  • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd 2.4.62-16.el8jbcs, jbcs-httpd24-mod_ssl 2.4.62-16.el8jbcs, jbcs-httpd24-mod_ldap 2.4.62-16.el8jbcs, jbcs-httpd24-httpd-tools 2.4.62-16.el8jbcs, jbcs-httpd24-mod_session 2.4.62-16.el8jbcs, jbcs-httpd24-httpd-manual 2.4.62-16.el8jbcs, +2 more
    fixed: vendor fix RHSA-2026:56868
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) httpd 2.4.53-11.el9_2.15, mod_lua 2.4.53-11.el9_2.15, mod_ssl 2.4.53-11.el9_2.15, mod_ldap 2.4.53-11.el9_2.15, httpd-tools 2.4.53-11.el9_2.15, mod_session 2.4.53-11.el9_2.15, +3 more Red Hat Enterprise Linux AppStream E4S (v.9.4) httpd 2.4.57-11.el9_4.5, mod_lua 2.4.57-11.el9_4.5, mod_ssl 2.4.57-11.el9_4.5, mod_ldap 2.4.57-11.el9_4.5, httpd-tools 2.4.57-11.el9_4.5, mod_session 2.4.57-11.el9_4.5, +3 more Red Hat Enterprise Linux Server (v. 7 ELS) mod_ssl 2.4.6-99.el7_9.8, httpd-tools 2.4.6-99.el7_9.8, mod_session 2.4.6-99.el7_9.8, httpd-manual 2.4.6-99.el7_9.8 Red Hat Enterprise Linux Server Optional (v. 7 ELS) mod_ldap 2.4.6-99.el7_9.8, mod_proxy_html 2.4.6-99.el7_9.8 Red Hat Hardened Images httpd Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-mod_md 2.4.28-19.el8jbcs, jbcs-httpd24-mod_http2 2.0.29-13.el8jbcs, jbcs-httpd24-mod_security 2.9.6-19.el8jbcs, jbcs-httpd24-mod_jk 1.2.50-17.redhat_1.el8jbcs, jbcs-httpd24-mod_proxy_cluster 1.3.22-12.el8jbcs, jbcs-httpd24-mod_jk-ap24 1.2.50-17.redhat_1.el8jbcs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
bitnami apache
>=2.4.0, <2.4.64
2.4.64

Affected products

  • Apache Software Foundation Apache HTTP Server

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.