CVE-2023-38709 json
Apache HTTP Server: HTTP response splitting
published 2024-04-04 2 y ago modified 2026-09-08 2 mo ago also BIT-apache-2023-38709 , EUVD-2023-42484
- cvss
- 7.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.9%
- EPSS 3.9% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses.
This issue affects Apache HTTP Server: through 2.4.58.
Patch / fix
- bitnami apache 2.4.59
- apache http_server 2.4.59
- apache2 Debian 12 2.4.59-1~deb12u1
- apache2 Debian 14, Debian 13 2.4.59-1
debian advisories DEBIAN-CVE-2023-38709
- apache2 Ubuntu 20.04 LTS 2.4.41-4ubuntu3.17
- apache2 Ubuntu 22.04 LTS 2.4.52-1ubuntu4.9
- apache2 Ubuntu 24.04 LTS 2.4.58-1ubuntu8.1
- apache2 Ubuntu Pro 14.04 LTS 2.4.7-1ubuntu4.22+esm12
- apache2 Ubuntu Pro 16.04 LTS 2.4.18-2ubuntu3.17+esm12
- apache2 Ubuntu Pro 18.04 LTS 2.4.29-1ubuntu4.27+esm2
ubuntu advisories UBUNTU-CVE-2023-38709
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
- httpd RHEL 9 2.4.62-1.el9
- mod_lua RHEL 9 2.4.62-1.el9
- mod_ssl RHEL 9 1:2.4.62-1.el9
- mod_ldap RHEL 9 2.4.62-1.el9
- httpd-core RHEL 9 2.4.62-1.el9
- httpd-tools RHEL 9 2.4.62-1.el9
- mod_session RHEL 9 2.4.62-1.el9
- httpd-manual RHEL 9 2.4.62-1.el9
red hat advisories RHSA-2024:9306RHSA-2024:6927RHSA-2024:4197
- 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 Package Hub 15 SP6, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.3.1
- apache2-event SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.3.1
- apache2-utils SLE Module for Server Applications 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.3.1
- apache2-manual openSUSE Leap 15.6 2.4.58-150600.5.3.1
- apache2-worker SLE Module for Server Applications 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.3.1
- apache2-prefork SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.4.58-150600.5.3.1
- apache2 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Server Applications 15 SP6 +8 more 2.4.51-150400.6.17.1
suse advisories SUSE-SU-2026:2686-1SUSE-SU-2024:1963-1SUSE-SU-2024:1868-1SUSE-SU-2024:1788-1SUSE-SU-2024:1627-1
- 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-2026:34109ALSA-2024:9306ALSA-2024:4197
- httpd Rocky Linux 9 2.4.62-1.el9
- httpd Rocky Linux 8 2.4.37-65.module+el8.10.0+1830+22f0c9e0
- mod_md Rocky Linux 8 1:2.0.8-8.module+el8.9.0+1370+89cc8ad5
- mod_http2 Rocky Linux 8 1.15.7-10.module+el8.10.0+1775+6b057638
rocky linux advisories RLSA-2024:9306RLSA-2024:4197
- apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 2.4.59-r0
alpine advisories ALPINE-CVE-2023-38709
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 Azure Linux 3.0 2.4.61-1
- httpd CBL-Mariner 2.0 2.4.59-1
azure linux advisories AZL-38605AZL-39190
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-2023-38709 updated cvss 6.8
httpd: HTTP response splitting
-
Red Hat OpenShift Pipelines httpdaffected: workaround, no fix planned “Will not fix”
-
Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual Red Hat Enterprise Linux 7 httpd, mod_ssl, mod_ldap, httpd-tools, mod_session, httpd-manual, +1 more Red Hat JBoss Enterprise Application Platform 6 httpd22 httpd22affected: workaround, no fix planned “Out of support scope”
-
Red Hat OpenShift GitOps httpdaffected: workaround, no fix planned “Will not fix”
-
Red Hat OpenStack Platform 16.1 httpd Red Hat OpenStack Platform 16.2 httpdaffected: workaround, no fix planned “Out of support scope”
-
Red Hat Software Collections httpd24-httpd, httpd24-mod_md, httpd24-mod_ssl, httpd24-mod_ldap, httpd24-httpd-tools, httpd24-mod_session, +2 moreaffected: workaround, no fix planned “Will not fix”
-
Red Hat Enterprise Linux AppStream (v. 8) mod_md 2.0.8-8.module+el8.9.0+19080+567b90f8, httpd 2.4.37-65.module+el8.10.0+21982+14717793, mod_ssl 2.4.37-65.module+el8.10.0+21982+14717793, mod_ldap 2.4.37-65.module+el8.10.0+21982+14717793, mod_http2 1.15.7-10.module+el8.10.0+21653+eaff63f0, httpd-tools 2.4.37-65.module+el8.10.0+21982+14717793, +4 morefixed: vendor fix RHSA-2024:4197
-
Red Hat Enterprise Linux AppStream (v. 9) httpd 2.4.62-1.el9, mod_lua 2.4.62-1.el9, mod_ssl 2.4.62-1.el9, mod_ldap 2.4.62-1.el9, httpd-core 2.4.62-1.el9, httpd-tools 2.4.62-1.el9, +4 morefixed: vendor fix RHSA-2024:9306
-
Red Hat JBoss Core Servicesfixed: vendor fix RHSA-2024:6928
show 2 moreshow fewer
-
Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd 2.4.57-15.el7jbcs, jbcs-httpd24-mod_ssl 2.4.57-15.el7jbcs, jbcs-httpd24-mod_ldap 2.4.57-15.el7jbcs, jbcs-httpd24-httpd-tools 2.4.57-15.el7jbcs, jbcs-httpd24-mod_session 2.4.57-15.el7jbcs, jbcs-httpd24-httpd-manual 2.4.57-15.el7jbcs, +2 more Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd 2.4.57-15.el8jbcs, jbcs-httpd24-mod_ssl 2.4.57-15.el8jbcs, jbcs-httpd24-mod_ldap 2.4.57-15.el8jbcs, jbcs-httpd24-httpd-tools 2.4.57-15.el8jbcs, jbcs-httpd24-mod_session 2.4.57-15.el8jbcs, jbcs-httpd24-httpd-manual 2.4.57-15.el8jbcs, +2 morefixed: vendor fix RHSA-2024:6927
-
Red Hat Enterprise Linux 10 httpd Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-mod_md 2.4.24-13.el7jbcs, jbcs-httpd24-mod_http2 1.15.19-43.el7jbcs, jbcs-httpd24-mod_security 2.9.3-42.el7jbcs, jbcs-httpd24-mod_jk 1.2.50-3.redhat_1.el7jbcs, jbcs-httpd24-mod_proxy_cluster 1.3.20-10.el7jbcs, jbcs-httpd24-mod_jk-ap24 1.2.50-3.redhat_1.el7jbcs Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-mod_md 2.4.24-13.el8jbcs, jbcs-httpd24-mod_http2 1.15.19-43.el8jbcs, jbcs-httpd24-mod_security 2.9.3-42.el8jbcs, jbcs-httpd24-mod_jk 1.2.50-3.redhat_1.el8jbcs, jbcs-httpd24-mod_proxy_cluster 1.3.20-10.el8jbcs, jbcs-httpd24-mod_jk-ap24 1.2.50-3.redhat_1.el8jbcs Red Hat OpenStack Platform 17.1 httpd Red Hat OpenStack Platform 18.0 httpdnot 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 ICSA-24-319-04 updated cvss 6.1
Siemens SINEC NMS
-
Siemens SINEC NMS <V3.0_SP1affected: fixed in V3.0 support.industry.siemens.com
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
3.91% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| CNA | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| OSV | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | apache | <2.4.59 |
2.4.59 |
Affected products
- Apache Software Foundation Apache HTTP Server
- apache http_server
Classification
- Weakness
-
- CWE-1284 Improper Validation of Specified Quantity in Input
- Technology feeds
References
-
httpd.apache.org
/security/vulnerabilities_24.html
vendor-advisory, advisory
-
security.netapp.com
/advisory/ntap-20240415-0013/
third-party-advisory, advisory
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/WNV4SZAPVS43DZWNFU7XBYYOZEZMI4ZC/
mailing-list, third-party-advisory, advisory
-
openwall.com
/lists/oss-security/2024/04/04/3
mailing-list, third-party-advisory, advisory
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/I2N2NZEX3MR64IWSGL3QGN7KSRUGAEMF/
mailing-list, third-party-advisory, advisory
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/LX5U34KYGDYPRH3AJ6MDDCBJDWDPXNVJ/
mailing-list, third-party-advisory, advisory
-
lists.debian.org
/debian-lts-announce/2024/05/msg00013.html
mailing-list, third-party-advisory, advisory
-
support.apple.com
/kb/HT214119
third-party-advisory, advisory
-
seclists.org
/fulldisclosure/2024/Jul/18
mailing-list, third-party-advisory, advisory
-
openwall.com
/lists/oss-security/2025/07/10/2
web
-
openwall.com
/lists/oss-security/2025/07/10/3
web
-
nvd.nist.gov
/vuln/detail/CVE-2023-38709
web
Sources
- CVE List CVE-2023-38709
- NVD CVE-2023-38709
- OSV BIT-apache-2023-38709
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.