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Fencer Vulns
high 7.5

CVE-2024-27316 in the critical feed json

Apache HTTP Server: HTTP/2 DoS by memory exhaustion on endless continuation frames

published 2024-04-04 2 y ago modified 2026-09-08 2 mo ago also BIT-apache-2024-27316 , EUVD-2024-24531

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
88.8%
EPSS 88.8% chance of exploitation in 30 days, percentile 99.7%
public exploits
0
none known

Summary

HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion.

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-2024-27316

  • 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 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-2024-27316

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

  • eap7-netty jboss enterprise application platform 7.4 4.1.108-1.Final_redhat_00001.1.el9eap
  • eap7-jandex jboss enterprise application platform 7.4 2.4.5-1.Final_redhat_00001.1.el9eap
  • eap7-wildfly jboss enterprise application platform 7.4 7.4.18-1.GA_redhat_00001.1.el9eap
  • eap7-undertow jboss enterprise application platform 7.4 2.2.33-1.SP1_redhat_00001.1.el9eap
  • eap7-hal-console jboss enterprise application platform 7.4 3.3.23-1.Final_redhat_00001.1.el9eap
  • eap7-ironjacamar jboss enterprise application platform 7.4 1.5.17-1.Final_redhat_00001.1.el9eap
  • eap7-netty-codec jboss enterprise application platform 7.4 4.1.108-1.Final_redhat_00001.1.el9eap
  • eap7-bouncycastle jboss enterprise application platform 7.4 1.78.1-1.redhat_00002.1.el9eap

red hat advisories RHSA-2024:5145RHSA-2025:16668RHSA-2025:16667RHSA-2024:2891RHSA-2024:2907RHSA-2024:1786

  • 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

  • mod_http2 AlmaLinux 9 2.0.26-2.el9_4
  • mod_http2 AlmaLinux 9 1.15.19-5.el9_3.1
  • httpd AlmaLinux 8 2.4.37-62.module_el8.9.0+3646+acd210d0
  • mod_md AlmaLinux 8 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
  • mod_md AlmaLinux 8 1:2.0.8-8.module_el8.6.0+3031+fb177b09
  • mod_ssl AlmaLinux 8 1:2.4.37-62.module_el8.9.0+3646+acd210d0
  • mod_ldap AlmaLinux 8 2.4.37-62.module_el8.9.0+3646+acd210d0
  • mod_http2 AlmaLinux 8 1.15.7-8.module_el8.9.0+3809+48080a14.5.alma.1

almalinux advisories ALSA-2024:2564ALSA-2024:1872ALSA-2024:1786

  • mod_http2 Rocky Linux 9 2.0.26-2.el9_4
  • httpd Rocky Linux 8 2.4.37-62.module+el8.9.0+1436+2b7d5021
  • mod_md Rocky Linux 8 1:2.0.8-8.module+el8.9.0+1370+89cc8ad5
  • mod_http2 Rocky Linux 8 1.15.7-8.module+el8.9.0+1370+89cc8ad5.3

rocky linux advisories RLSA-2024:2564RLSA-2024:1786

  • apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 2.4.59-r0

alpine advisories ALPINE-CVE-2024-27316

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
  • mod_http2 Azure Linux 3.0 2.0.29-3

azure linux advisories AZL-40001AZL-40012AZL-44151

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-2024-27316 updated cvss 7.5

httpd: CONTINUATION frames DoS

  • Red Hat Cryostat 2 HTTP-2 HTTP-2
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Migration Toolkit for Applications 6 HTTP-2
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Migration Toolkit for Runtimes HTTP-2
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat OpenShift Developer Tools and Services jenkins Red Hat 3scale API Management Platform 2 3scale-amp2/backend-rhel7 Red Hat Advanced Cluster Security 3 advanced-cluster-security/rhacs-main-rhel8 Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Build of Keycloak HTTP-2 HTTP-2
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual, libmicrohttpd Red Hat Enterprise Linux 7 keycloak-httpd-client-install, python2-keycloak-httpd-client-install
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Enterprise Linux 10 httpd Red Hat JBoss Core Services mod_http2 Red Hat JBoss Enterprise Application Platform Expansion Pack HTTP-2 HTTP-2
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat OpenShift Container Platform 3.11 jenkins
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
show 19 more
  • Red Hat OpenShift Data Science (RHODS) rhods/odh-dashboard-rhel8 Red Hat OpenShift Dev Spaces devspaces/code-rhel8, devspaces/pluginregistry-rhel8 Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8
    affected: workaround, no fix available “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Service Interconnect 1 libwebsockets Red Hat Single Sign-On 7 HTTP-2 HTTP-2 Red Hat Software Collections httpd24-nghttp2, httpd24-libnghttp2 Red Hat streams for Apache Kafka HTTP-2 HTTP-2
    affected: workaround, no fix planned “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.”
  • Red Hat Enterprise Linux AppStream (v. 8) mod_md 2.0.8-8.module+el8.9.0+19080+567b90f8, httpd 2.4.37-62.module+el8.9.0+19699+7a7a2044, mod_ssl 2.4.37-62.module+el8.9.0+19699+7a7a2044, mod_ldap 2.4.37-62.module+el8.9.0+19699+7a7a2044, mod_http2 1.15.7-8.module+el8.9.0+21652+2dd1200b.5, httpd-tools 2.4.37-62.module+el8.9.0+19699+7a7a2044, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:1786
  • Red Hat Enterprise Linux AppStream (v. 9) mod_http2 2.0.26-2.el9_4, mod_http2 1.15.19-5.el9_3.1
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:1872
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) mod_md 2.0.8-8.module+el8.3.0+6814+67d1e611, httpd 2.4.37-47.module+el8.6.0+19809+6e655c60.7, mod_ssl 2.4.37-47.module+el8.6.0+19809+6e655c60.7, mod_http2 1.15.7-5.module+el8.6.0+21746+f601aac0.3, mod_ldap 2.4.37-47.module+el8.6.0+19809+6e655c60.7, httpd-tools 2.4.37-47.module+el8.6.0+19809+6e655c60.7, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:2907
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) mod_md 2.0.8-8.module+el8.3.0+6814+67d1e611, httpd 2.4.37-56.module+el8.8.0+19808+379766d6.7, mod_ssl 2.4.37-56.module+el8.8.0+19808+379766d6.7, mod_http2 1.15.7-8.module+el8.8.0+21773+20528f83.5, mod_ldap 2.4.37-56.module+el8.8.0+19808+379766d6.7, httpd-tools 2.4.37-56.module+el8.8.0+19808+379766d6.7, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:2891
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) mod_http2 1.15.19-3.el9_0.6
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:3417
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) mod_http2 1.15.19-4.el9_2.6
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:3402
  • Red Hat JBoss Core Services
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:2694
  • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-curl 8.7.1-2.el7jbcs, jbcs-httpd24-httpd 2.4.57-10.el7jbcs, jbcs-httpd24-libcurl 8.7.1-2.el7jbcs, jbcs-httpd24-mod_md 2.4.24-6.el7jbcs, jbcs-httpd24-mod_ssl 2.4.57-10.el7jbcs, jbcs-httpd24-nghttp2 1.43.0-13.el7jbcs, +11 more Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-curl 8.7.1-2.el8jbcs, jbcs-httpd24-httpd 2.4.57-10.el8jbcs, jbcs-httpd24-libcurl 8.7.1-2.el8jbcs, jbcs-httpd24-mod_md 2.4.24-6.el8jbcs, jbcs-httpd24-mod_ssl 2.4.57-10.el8jbcs, jbcs-httpd24-nghttp2 1.43.0-13.el8jbcs, +11 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:2693
  • Red Hat JBoss EAP 7.4 for RHEL 7 Server eap7-wildfly 7.4.18-1.GA_redhat_00001.1.el7eap, eap7-jandex 2.4.5-1.Final_redhat_00001.1.el7eap, eap7-bouncycastle 1.78.1-1.redhat_00002.1.el7eap, eap7-netty 4.1.108-1.Final_redhat_00001.1.el7eap, eap7-undertow 2.2.33-1.SP1_redhat_00001.1.el7eap, eap7-bouncycastle-pg 1.78.1-1.redhat_00002.1.el7eap, +53 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:5143
  • Red Hat JBoss EAP 7.4 for RHEL 8 eap7-wildfly 7.4.18-1.GA_redhat_00001.1.el8eap, eap7-jandex 2.4.5-1.Final_redhat_00001.1.el8eap, eap7-bouncycastle 1.78.1-1.redhat_00002.1.el8eap, eap7-netty 4.1.108-1.Final_redhat_00001.1.el8eap, eap7-undertow 2.2.33-1.SP1_redhat_00001.1.el8eap, eap7-bouncycastle-pg 1.78.1-1.redhat_00002.1.el8eap, +54 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:5144
  • Red Hat JBoss EAP 7.4 for RHEL 9 eap7-wildfly 7.4.18-1.GA_redhat_00001.1.el9eap, eap7-jandex 2.4.5-1.Final_redhat_00001.1.el9eap, eap7-bouncycastle 1.78.1-1.redhat_00002.1.el9eap, eap7-netty 4.1.108-1.Final_redhat_00001.1.el9eap, eap7-undertow 2.2.33-1.SP1_redhat_00001.1.el9eap, eap7-bouncycastle-pg 1.78.1-1.redhat_00002.1.el9eap, +53 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:5145
  • Red Hat JBoss EAP 8.0 for RHEL 8 eap8-jose4j 0.9.6-1.redhat_00001.1.el8eap, eap8-wildfly 8.0.2-5.GA_redhat_00012.1.el8eap, eap8-undertow 2.3.14-1.SP1_redhat_00001.1.el8eap, eap8-hibernate 6.2.26-1.Final_redhat_00001.1.el8eap, eap8-wildfly-modules 8.0.2-5.GA_redhat_00012.1.el8eap, eap8-hibernate-core 6.2.26-1.Final_redhat_00001.1.el8eap, +5 more Red Hat JBoss EAP 8.0 for RHEL 9 eap8-jose4j 0.9.6-1.redhat_00001.1.el9eap, eap8-wildfly 8.0.2-5.GA_redhat_00012.1.el9eap, eap8-undertow 2.3.14-1.SP1_redhat_00001.1.el9eap, eap8-hibernate 6.2.26-1.Final_redhat_00001.1.el9eap, eap8-wildfly-modules 8.0.2-5.GA_redhat_00012.1.el9eap, eap8-hibernate-core 6.2.26-1.Final_redhat_00001.1.el9eap, +5 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4390
  • Red Hat JBoss Enterprise Application Platform undertow-core 2.2.33.SP1-redhat-00001
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:5147
  • Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 Server eap7-wildfly 7.1.12-2.GA_redhat_00002.1.ep7.el7, eap7-hornetq 2.4.11-1.Final_redhat_00001.1.ep7.el7, eap7-undertow 1.4.18-17.SP15_redhat_00001.1.ep7.el7, eap7-wildfly-modules 7.1.12-2.GA_redhat_00002.1.ep7.el7, eap7-hornetq-commons 2.4.11-1.Final_redhat_00001.1.ep7.el7, eap7-hibernate-validator 5.3.6-1.SP1_redhat_00001.1.ep7.el7, +4 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2025:16668
  • Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 Server eap7-wildfly 7.3.15-5.GA_redhat_00003.1.el7eap, eap7-undertow 2.0.41-5.SP6_redhat_00001.1.el7eap, eap7-hornetq 2.4.11-1.Final_redhat_00001.1.el7eap, eap7-wildfly-modules 7.3.15-5.GA_redhat_00003.1.el7eap, eap7-wildfly-javadocs 7.3.15-5.GA_redhat_00003.1.el7eap, eap7-wildfly-java-jdk8 7.3.15-5.GA_redhat_00003.1.el7eap, +27 more
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2025:16667
  • Red Hat JBoss Enterprise Application Platform 8
    fixed: vendor fix “Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.” RHSA-2024:4392
  • Red Hat .NET 6.0 on Red Hat Enterprise Linux rh-dotnet60-dotnet, rh-dotnet60-dotnet-host, rh-dotnet60-dotnet-sdk-6.0, rh-dotnet60-dotnet-hostfxr-6.0, rh-dotnet60-dotnet-runtime-6.0, rh-dotnet60-dotnet-templates-6.0, +6 more
    not affected: vulnerable code not present

24 more not affected in the full advisory

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
2 y ago

Exploit prediction

88.75% chance of exploitation in the next 30 days, higher than 99.7% 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:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami apache
>=2.4.17, <2.4.59
2.4.59

Affected products

  • Apache Software Foundation Apache HTTP Server
  • apache http_server

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
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.