CVE-2021-44224

CWE-476 — NULL Pointer DereferenceCWE-918 — Server-Side Request Forgery (SSRF)15 documents10 sources
Severity
8.2HIGH
EPSS
11.0%
top 6.58%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
13
Apache Software Foundation Apache Http ServerApache Http ServerApple Macos+10 more
Timeline
PublishedDec 20
Latest updateMay 16

Description

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:HExploitability: 3.9 | Impact: 4.2

Affected Packages13 packages

▶NVDapache/http_server2.4.7 — 2.4.52
▶CVEListV5apache_software_foundation/apache_http_server2.4.7 — Apache HTTP Server 2.4*
▶NVDoracle/http_server12.2.1.3.0, 12.2.1.4.0+1
▶Debianapache2< 2.4.52-1~deb11u2+3
▶Ubuntuapache2< 2.4.29-1ubuntu4.21+3

Also affects: Debian Linux 10.0, 11.0, Fedora 34, 35, 36

Patches

Patch: www.oracle.com ↗Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

5
GHSA
GHSA-92ww-hwmg-qq7p: A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixin↗2022-02-08
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OSV
apache2 vulnerabilities↗2022-01-10
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OSV
apache2 vulnerabilities↗2022-01-06
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OSV
CVE-2021-44224: A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixin↗2021-12-20
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CVEList
Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier↗2021-12-20
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📋Vendor Advisories

9
Apple
CVE-2021-44224: Security Update 2022-004 Catalina↗2022-05-16
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Apple
CVE-2021-44224: macOS Big Sur 11.6.6↗2022-05-16
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Apple
CVE-2021-44224: macOS Monterey 12.4↗2022-05-16
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Oracle
Oracle Oracle Fusion Middleware Risk Matrix: SSL Module (Apache HTTP Server) — CVE-2021-44224↗2022-04-15
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Ubuntu
Apache HTTP Server vulnerabilities↗2022-01-10
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