high
8.2
CWE
476 918
Advisory Published
CVE Published
Updated

CVE-2021-44224: Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier

First published: Mon Dec 20 2021(Updated: )

apache. Multiple issues were addressed by updating apache to version 2.4.53.

Credit: CVE-2021-44224 CVE-2021-44790 CVE-2022-22719 CVE-2022-22720 CVE-2022-22721 CVE-2021-44224 CVE-2021-44790 CVE-2022-22719 CVE-2022-22720 CVE-2022-22721 CVE-2021-44224 CVE-2021-44790 CVE-2022-22719 CVE-2022-22720 CVE-2022-22721 security@apache.org

Affected SoftwareAffected VersionHow to fix
Apple Catalina
Apple macOS Big Sur<11.6.6
11.6.6
<12.4
12.4
Apache HTTP server>=2.4.7<2.4.52
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Tenable Tenable.sc>=5.14.0<5.20.0
Tenable Tenable.sc>=5.16.0<202201.1
Oracle Communications Element Manager<9.0
Oracle Communications Operations Monitor=4.0
Oracle Communications Operations Monitor=4.3
Oracle Communications Operations Monitor=4.4
Oracle Communications Operations Monitor=5.0
Oracle Communications Session Report Manager<9.0
Oracle Communications Session Route Manager<9.0
Oracle HTTP Server
Oracle HTTP Server=12.2.1.3.0
Oracle HTTP Server=12.2.1.4.0
Oracle Instantis Enterprisetrack=17.1
Oracle Instantis Enterprisetrack=17.2
Oracle Instantis Enterprisetrack=17.3
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-security_update_2020-001
Apple Mac OS X=10.15.7-security_update_2021-001
Apple Mac OS X=10.15.7-security_update_2021-002
Apple Mac OS X=10.15.7-security_update_2021-003
Apple Mac OS X=10.15.7-security_update_2021-004
Apple Mac OS X=10.15.7-security_update_2021-005
Apple Mac OS X=10.15.7-security_update_2021-006
Apple Mac OS X=10.15.7-security_update_2021-007
Apple Mac OS X=10.15.7-security_update_2021-008
Apple Mac OS X=10.15.7-security_update_2022-001
Apple Mac OS X=10.15.7-security_update_2022-002
Apple Mac OS X=10.15.7-security_update_2022-003
Apple macOS<10.15.7
Apple macOS>=11.0<11.6.6
Apple macOS>=12.0.0<12.4
redhat/httpd<2.4.52
2.4.52
redhat/jbcs-httpd24-httpd<0:2.4.51-28.el8
0:2.4.51-28.el8
redhat/jbcs-httpd24-httpd<0:2.4.51-28.el7
0:2.4.51-28.el7
redhat/httpd24-httpd<0:2.4.34-23.el7.5
0:2.4.34-23.el7.5
debian/apache2
2.4.38-3+deb10u8
2.4.38-3+deb10u10
2.4.56-1~deb11u2
2.4.56-1~deb11u1
2.4.57-2
2.4.57-3
2.4.58-1

Remedy

https://www.oracle.com/security-alerts/cpuapr2022.html

Remedy

https://www.oracle.com/security-alerts/cpujan2022.html

Remedy

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-44224?

    CVE-2021-44224 is a vulnerability in the Apache HTTP server that allows for a null pointer dereference and server-side request forgery (SSRF) when the mod_proxy module is configured as a forward proxy.

  • How does CVE-2021-44224 impact the Apache HTTP server?

    CVE-2021-44224 can cause a crash or allow for SSRF attacks if a crafted packet is sent to the forward proxy on the adjacent network.

  • What is the severity of CVE-2021-44224?

    CVE-2021-44224 has a severity value of 7, indicating a high severity.

  • How can I fix CVE-2021-44224?

    To fix CVE-2021-44224, update Apache HTTP server to version 2.4.53 or later.

  • Are there any references for CVE-2021-44224?

    Yes, you can find references for CVE-2021-44224 at the following links: [Link 1](https://support.apple.com/en-us/HT213257), [Link 2](https://support.apple.com/en-us/HT213255), [Link 3](https://support.apple.com/en-us/HT213256).

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