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CVE-2022-22721— core: Possible buffer overflow with very large or unlimited LimitXMLRequestBody

Quick assessment

Affected

Apache Software Foundation Apache HTTP Server

Exploitation

High exploitation probability; assess promptly

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.52 及更早版本存在输入验证错误漏洞，该漏洞源于如果在 32 位系统上将 LimitXMLRequestBody 设置为允许大于 350MB（默认为 1M）的请求正文，则会发生整数溢出，随后会导致越界写入。

AI Predicted 7.5 Difficulty: Hard EPSS 41.71% · P99 Updated Feb 25, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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I. Basic Information for CVE-2022-22721

Vulnerability Information

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Vulnerability Title

core: Possible buffer overflow with very large or unlimited LimitXMLRequestBody

Source: CVE Program / CVE List V5

Vulnerability Description

If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server 2.4.52 and earlier.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

整数溢出或超界折返

Source: CVE Program / CVE List V5

Vulnerability Title

Apache HTTP Server 输入验证错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Apache Software Foundation	Apache HTTP Server	Apache HTTP Server 2.4 ~ 2.4.52	-

II. Public POCs for CVE-2022-22721

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2022-22721

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Vendor Advisories for CVE-2022-22721 (8)

https://support.apple.com/kb/HT213256 x_refsource_CONFIRM
https://support.apple.com/kb/HT213257 x_refsource_CONFIRM
https://support.apple.com/kb/HT213255 x_refsource_CONFIRM
Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project x_refsource_MISC
🔗 NetApp Product Security Read full article x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
🔗 Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security Read full article vendor-advisory x_refsource_GENTOO

Mailing List Discussions for CVE-2022-22721 (8)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/ vendor-advisory x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/ vendor-advisory x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/ vendor-advisory x_refsource_FEDORA
http://seclists.org/fulldisclosure/2022/May/38 mailing-list x_refsource_FULLDISC
http://seclists.org/fulldisclosure/2022/May/35 mailing-list x_refsource_FULLDISC
http://seclists.org/fulldisclosure/2022/May/33 mailing-list x_refsource_FULLDISC
https://lists.debian.org/debian-lts-announce/2022/03/msg00033.html mailing-list x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2022/03/14/2 mailing-list x_refsource_MLIST

https://www.cve.org/CVERecord?id=CVE-2022-22721

Same Patch Batch · Apache Software Foundation · 2022-03-14 · 4 CVEs total

CVE-2022-22719		mod_lua Use of uninitialized value of in r:parsebody
CVE-2022-22720		HTTP request smuggling vulnerability in Apache HTTP Server 2.4.52 and earlier
CVE-2022-23943		mod_sed: Read/write beyond bounds

IV. Related Vulnerabilities

Same product: Apache HTTP Server

Same vendor: Apache Software Foundation

Same weakness: CWE-190

V. Comments for CVE-2022-22721

No comments yet

Goal Reached Thanks to every supporter — we hit 100%!

CVE-2022-22721— core: Possible buffer overflow with very large or unlimited LimitXMLRequestBody

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2022-22721

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2022-22721

III. Intelligence Information for CVE-2022-22721

Vendor Advisories for CVE-2022-22721 (8)

Mailing List Discussions for CVE-2022-22721 (8)

Same Patch Batch · Apache Software Foundation · 2022-03-14 · 4 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2022-22721

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