CVE-2021-44790

CRITICALImmediate

Published:Dec 20, 2021(4 years ago)

Modified:May 1, 2025

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability Description

A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.

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	2.4.52	-
fedoraproject	fedora	-	-
fedoraproject	fedora	-

Timeline

Published
CVE disclosed publicly
Dec 20, 20214 years ago
Last Modified
Most recent update
May 1, 20251 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://packetstormsecurity.com/files/171631/Apache-2.4.x-Buffer-Overfl...Exploit
http://seclists.org/fulldisclosure/2022/May/33Mailing List

CVSS Score

v3.1

9.8/ 10.0

CRITICAL

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

At a Glance

Affected Products

References

apache / http_server

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

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

http://www.openwall.com/lists/oss-security/2021/12/20/4Mailing List

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

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://packetstormsecurity.com/files/171631/Apache-2.4.x-Buffer-Overfl...Exploit

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/2021/12/20/4Mailing List

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

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:H/I:H/A:H

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Impact Analysis

ConfidentialityHigh

NoneLowHigh

IntegrityHigh

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2021-44790

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description