CVE-2021-44224

HIGHScheduled

Published:Dec 20, 2021(4 years ago)

Modified:Nov 21, 2024

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability 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).

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
apache	http_server	2.4.7 - 2.4.52	-
fedoraproject	fedora	-	-
fedoraproject	fedora	-

Timeline

Published
CVE disclosed publicly
Dec 20, 20214 years ago
Last Modified
Most recent update
Nov 21, 20241 year ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
http://seclists.org/fulldisclosure/2022/May/33Mailing List
http://seclists.org/fulldisclosure/2022/May/35Mailing List

CVSS Score

v3.1

8.2/ 10.0

HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

At a Glance

Affected Products

References

apache / http_server

http://seclists.org/fulldisclosure/2022/May/38Mailing List

http://www.openwall.com/lists/oss-security/2021/12/20/3Mailing List

https://lists.fedoraproject.org/archives/list/package-announce%40lists...

https://security.gentoo.org/glsa/202208-20Third Party Advisory

https://security.netapp.com/advisory/ntap-20211224-0001/Third Party Advisory

https://support.apple.com/kb/HT213255Third Party Advisory

https://support.apple.com/kb/HT213256Third Party Advisory

https://support.apple.com/kb/HT213257Third Party Advisory

https://www.debian.org/security/2022/dsa-5035Third Party Advisory

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

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

https://www.tenable.com/security/tns-2022-01Third Party Advisory

https://www.tenable.com/security/tns-2022-03Third Party Advisory

http://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory

http://seclists.org/fulldisclosure/2022/May/33Mailing List

http://seclists.org/fulldisclosure/2022/May/35Mailing List

http://seclists.org/fulldisclosure/2022/May/38Mailing List

http://www.openwall.com/lists/oss-security/2021/12/20/3Mailing List

https://lists.fedoraproject.org/archives/list/package-announce%40lists...

https://security.gentoo.org/glsa/202208-20Third Party Advisory

https://security.netapp.com/advisory/ntap-20211224-0001/Third Party Advisory

https://support.apple.com/kb/HT213255Third Party Advisory

https://support.apple.com/kb/HT213256Third Party Advisory

https://support.apple.com/kb/HT213257Third Party Advisory

https://www.debian.org/security/2022/dsa-5035Third Party Advisory

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

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

https://www.tenable.com/security/tns-2022-01Third Party Advisory

https://www.tenable.com/security/tns-2022-03Third Party Advisory

CVSS v3 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityNone

IntegrityLow

AvailabilityHigh

Impact Analysis

ConfidentialityNone

NoneLowHigh

IntegrityLow

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2021-44224

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description