Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2019-0211

Use After Free

Published: Apr 08, 2019 | Modified: Oct 27, 2025
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Ubuntu
HIGH
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-0211
CWEhttps://cwe.mitre.org/data/definitions/416.html

In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could execute arbitrary code with the privileges of the parent process (usually root) by manipulating the scoreboard. Non-Unix systems are not affected.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Http_serverApache2.4.17 (including)2.4.38 (including)
JBoss Core Services Apache HTTP Server 2.4.29 SP2RedHat*
JBoss Core Services Apache HTTP Server 2.4.29 SP2RedHathttpd*
JBoss Core Services on RHEL 6RedHatjbcs-httpd24-httpd-0:2.4.29-40.jbcs.el6*
JBoss Core Services on RHEL 6RedHatjbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el6*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-httpd-0:2.4.29-40.jbcs.el7*
JBoss Core Services on RHEL 7RedHatjbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el7*
Red Hat Enterprise Linux 8RedHathttpd:2.4-8000020190405071959.55190bc5*
Red Hat Software Collections for Red Hat Enterprise Linux 6RedHathttpd24-httpd-0:2.4.34-7.el6.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Apache2Ubuntubionic*
Apache2Ubuntucosmic*
Apache2Ubuntudevel*
Apache2Ubuntuesm-infra/bionic*
Apache2Ubuntuesm-infra/xenial*
Apache2Ubuntuxenial*

Potential Mitigations

References

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