CVE-2018-1333— DoS for HTTP/2 connections by crafted requests

EPSS 22.31% · P96 Updated Feb 21, 2026

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I. Basic Information for CVE-2018-1333

Vulnerability Information

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Vulnerability Title

DoS for HTTP/2 connections by crafted requests

Source: NVD (National Vulnerability Database)

Vulnerability Description

By specially crafting HTTP/2 requests, workers would be allocated 60 seconds longer than necessary, leading to worker exhaustion and a denial of service. Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.18-2.4.30,2.4.33).

Source: NVD (National Vulnerability Database)

CVSS Information

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Type

N/A

Source: NVD (National Vulnerability Database)

Vulnerability Title

Apache HTTP Server 资源管理错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Apache HTTP Server是美国阿帕奇（Apache）软件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中存在拒绝服务漏洞。远程攻击者可通过发送特制的HTTP/2请求利用该漏洞造成拒绝服务。以下版本受到影响：Apache HTTP Server 2.4.18版本，2.4.20版本，2.4.23版本，2.4.29版本，2.4.33版本，2.4.30版本。

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	Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.18-2.4.30,2.4.33)	-

II. Public POCs for CVE-2018-1333

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2018-1333

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https://www.tenable.com/security/tns-2019-09x_refsource_CONFIRM
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03909en_usx_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-20180926-0007/x_refsource_CONFIRM
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-1333x_refsource_CONFIRM
http://www.securitytracker.com/id/1041402vdb-entryx_refsource_SECTRACK
https://usn.ubuntu.com/3783-1/vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:0366vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:3558vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0367vendor-advisoryx_refsource_REDHAT
https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/-Apache Mail Archivesmailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r15f9aa4427581a1aecb4063f1b4b983511ae1c9935e2a0a6876dad3c%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html-Apache Mail Archivesmailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3Emailing-listx_refsource_MLIST
https://nvd.nist.gov/vuln/detail/CVE-2018-1333

IV. Related Vulnerabilities

Same product: Apache HTTP Server

Same vendor: Apache Software Foundation

V. Comments for CVE-2018-1333

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CVE-2018-1333— DoS for HTTP/2 connections by crafted requests

I. Basic Information for CVE-2018-1333

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-2018-1333

III. Intelligence Information for CVE-2018-1333

IV. Related Vulnerabilities

V. Comments for CVE-2018-1333

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