medium
5.3
CWE
400
Advisory Published
CVE Published
Updated

CVE-2018-17189

First published: Tue Jan 22 2019(Updated: )

A flaw was found in HTTP/2 (mod_http2) connections in Apache HTTP Server httpd 2.4.17 to 2.4.37. A DoS can be triggered by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. References: <a href="https://seclists.org/oss-sec/2019/q1/80">https://seclists.org/oss-sec/2019/q1/80</a> <a href="https://httpd.apache.org/security/vulnerabilities_24.html">https://httpd.apache.org/security/vulnerabilities_24.html</a>

Credit: security@apache.org

Affected SoftwareAffected VersionHow to fix
redhat/jbcs-httpd24-apr<0:1.6.3-63.jbcs.el6
0:1.6.3-63.jbcs.el6
redhat/jbcs-httpd24-apr-util<0:1.6.1-48.jbcs.el6
0:1.6.1-48.jbcs.el6
redhat/jbcs-httpd24-brotli<0:1.0.6-7.jbcs.el6
0:1.0.6-7.jbcs.el6
redhat/jbcs-httpd24-curl<0:7.64.1-14.jbcs.el6
0:7.64.1-14.jbcs.el6
redhat/jbcs-httpd24-httpd<0:2.4.37-33.jbcs.el6
0:2.4.37-33.jbcs.el6
redhat/jbcs-httpd24-jansson<0:2.11-20.jbcs.el6
0:2.11-20.jbcs.el6
redhat/jbcs-httpd24-nghttp2<0:1.39.2-4.jbcs.el6
0:1.39.2-4.jbcs.el6
redhat/jbcs-httpd24-openssl<1:1.1.1-25.jbcs.el6
1:1.1.1-25.jbcs.el6
redhat/jbcs-httpd24-apr<0:1.6.3-63.jbcs.el7
0:1.6.3-63.jbcs.el7
redhat/jbcs-httpd24-apr-util<0:1.6.1-48.jbcs.el7
0:1.6.1-48.jbcs.el7
redhat/jbcs-httpd24-brotli<0:1.0.6-7.jbcs.el7
0:1.0.6-7.jbcs.el7
redhat/jbcs-httpd24-curl<0:7.64.1-14.jbcs.el7
0:7.64.1-14.jbcs.el7
redhat/jbcs-httpd24-httpd<0:2.4.37-33.jbcs.el7
0:2.4.37-33.jbcs.el7
redhat/jbcs-httpd24-jansson<0:2.11-20.jbcs.el7
0:2.11-20.jbcs.el7
redhat/jbcs-httpd24-nghttp2<0:1.39.2-4.jbcs.el7
0:1.39.2-4.jbcs.el7
redhat/jbcs-httpd24-openssl<1:1.1.1-25.jbcs.el7
1:1.1.1-25.jbcs.el7
redhat/httpd24<0:1.1-19.el6
0:1.1-19.el6
redhat/httpd24-httpd<0:2.4.34-15.el6
0:2.4.34-15.el6
redhat/httpd24-nghttp2<0:1.7.1-8.el6
0:1.7.1-8.el6
redhat/httpd24<0:1.1-19.el7
0:1.1-19.el7
redhat/httpd24-httpd<0:2.4.34-15.el7
0:2.4.34-15.el7
redhat/httpd24-nghttp2<0:1.7.1-8.el7
0:1.7.1-8.el7
debian/apache2<=2.4.25-3<=2.4.37-1<=2.4.25-3+deb9u6
2.4.38-1
2.4.25-3+deb9u7
redhat/httpd<2.4.38
2.4.38
debian/apache2
2.4.62-1~deb11u1
2.4.62-1~deb11u2
2.4.62-1~deb12u2
2.4.63-1
Apache HTTP Server=2.4.17
Apache HTTP Server=2.4.18
Apache HTTP Server=2.4.20
Apache HTTP Server=2.4.23
Apache HTTP Server=2.4.25
Apache HTTP Server=2.4.26
Apache HTTP Server=2.4.27
Apache HTTP Server=2.4.28
Apache HTTP Server=2.4.29
Apache HTTP Server=2.4.30
Apache HTTP Server=2.4.33
Apache HTTP Server=2.4.34
Apache HTTP Server=2.4.35
Apache HTTP Server=2.4.37
NetApp SANtricity Cloud Connector
NetApp Storage Automation Store
Fedora=28
Fedora=29
Debian=9.0
Oracle Enterprise Manager Ops Center=12.3.3
Oracle Hospitality Guest Access=4.2.0
Oracle Hospitality Guest Access=4.2.1
Oracle Instantis EnterpriseTrack=17.1
Oracle Instantis EnterpriseTrack=17.2
Oracle Instantis EnterpriseTrack=17.3
Oracle Retail Xstore Office Cloud Service=7.0
Oracle Retail Xstore Office Cloud Service=7.1
Oracle Storage Cloud Software Appliance=8.8.6
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10
Red Hat JBoss Core Services=1.0
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
All of
Red Hat JBoss Core Services=1.0
Any of
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0

Remedy

https://github.com/apache/httpd/commit/bea40bf64ce390476dc05c48a8699e76a96320a2

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2018-17189?

    CVE-2018-17189 is classified as a DoS (Denial of Service) vulnerability.

  • How do I fix CVE-2018-17189?

    To fix CVE-2018-17189, upgrade to version 2.4.38 or later of the Apache HTTP Server.

  • Which Apache HTTP Server versions are affected by CVE-2018-17189?

    CVE-2018-17189 affects Apache HTTP Server versions 2.4.17 to 2.4.37.

  • What happens if my server is vulnerable to CVE-2018-17189?

    If your server is vulnerable to CVE-2018-17189, it can be subjected to resource exhaustion due to slow loris attacks.

  • Is CVE-2018-17189 related to HTTP/2 connections?

    Yes, CVE-2018-17189 specifically affects HTTP/2 connections in Apache HTTP Server.

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