CVE-2019-10082: Use After Free

Published Aug 14, 2019
·
Updated

A read-after-free vulnerability was discovered in Apache httpd, in modhttp2. A specially crafted http/2 client session could cause the server to read memory that was previously freed during connection shutdown, potentially leading to a crash.

Other sources

A vulnerability was found in httpd, where using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection shutdown.

Red Hat

In Apache HTTP Server 2.4.18-2.4.39, using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection shutdown.

Affected Software

22 affected componentsFixes available
redhat/jbcs-httpd24-apr<0:1.6.3-86.jbcs.el6
0:1.6.3-86.jbcs.el6
redhat/jbcs-httpd24-brotli<0:1.0.6-21.jbcs.el6
0:1.0.6-21.jbcs.el6
redhat/jbcs-httpd24-httpd<0:2.4.37-52.jbcs.el6
0:2.4.37-52.jbcs.el6
redhat/jbcs-httpd24-openssl<1:1.1.1c-16.jbcs.el6
1:1.1.1c-16.jbcs.el6
redhat/jbcs-httpd24-apr<0:1.6.3-86.jbcs.el7
0:1.6.3-86.jbcs.el7
redhat/jbcs-httpd24-brotli<0:1.0.6-21.jbcs.el7
0:1.0.6-21.jbcs.el7
redhat/jbcs-httpd24-httpd<0:2.4.37-52.jbcs.el7
0:2.4.37-52.jbcs.el7
redhat/jbcs-httpd24-openssl<1:1.1.1c-16.jbcs.el7
1:1.1.1c-16.jbcs.el7
redhat/httpd<2.4.41
2.4.41
Apache HTTP Server>=2.4.18<=2.4.39
Oracle Communications Element Manager=8.0.0
Oracle Communications Element Manager=8.1.0
Oracle Communications Element Manager=8.1.1
Oracle Communications Element Manager=8.2.0
Oracle Enterprise Manager Ops Center=12.3.3
Oracle Enterprise Manager Ops Center=12.4.0
Oracle Enterprise Manager Ops Center=12.4.0.0
Oracle HTTP Server=12.2.1.3.0
Oracle HTTP Server=12.2.1.4.0
Oracle Instantis Enterprisetrack>=17.1<=17.3
Oracle Retail Xstore Point of Service=7.1
debian/apache2
2.4.62-1~deb11u12.4.66-1~deb11u12.4.66-1~deb12u12.4.62-1~deb12u22.4.66-1~deb13u22.4.66-8

Remediation

Information

This flaw is only exploitable if Apache httpd is configured to respond to HTTP/2 requests, which is done by including "h2" or "h2c" in the "Protocols" list in a configuration file. The following command can be used to search for possible vulnerable configurations: grep -R '^\s*Protocols\>.*\<h2\>' /etc/httpd/ See https://httpd.apache.org/docs/2.4/mod/mod_http2.html

Mitigation

Unpatched servers can disable the h2/h2c protocol.

Event History

Aug 14, 2019
CVE Published
12:00 AM
Aug 21, 2019
Data Sourced
via Red Hat·05:37 AM
DescriptionSeverityAffected Software
Sep 26, 2019
CVE Published
via MITRE·02:40 PM
Data Sourced
via MITRE·02:40 PM
DescriptionWeakness
Feb 20, 2026
Data Sourced
via Ubuntu·09:34 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Launchpad·09:35 PM
Description
Mar 14, 2026
Data Sourced
via Debian·09:53 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is CVE-2019-10082?

CVE-2019-10082 is a read-after-free vulnerability in Apache httpd, in mod_http2, which could result in a crash.

2

What is the severity of CVE-2019-10082?

The severity of CVE-2019-10082 is medium with a CVSS score of 6.5.

3

Which software versions are affected by CVE-2019-10082?

The Apache HTTP Server versions 2.4.18-2.4.39 are affected by CVE-2019-10082.

4

How can I fix CVE-2019-10082?

To fix CVE-2019-10082, you should update your Apache HTTP Server to version 2.4.41 or higher.

5

Where can I find more information about CVE-2019-10082?

You can find more information about CVE-2019-10082 on the Red Hat Bugzilla page.

Contact

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