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CVE-2016-8740

Quick assessment

Affected
Apache Software Foundation Apache HTTP Server
Exploitation
Public or AI PoC available; prioritize validation
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）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 2.4.17至2.4.23版本的‘mod_http2’模块中存在安全漏洞，该漏洞源于当Protocols配置文件包含h2或h2c时，程序没有限制request-header长度。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（内存消耗）。

AI Predicted 7.5 Difficulty: Easy EPSS 79.07% · P100

Public Exploits 1

ExploitDB · 1 EDB-40909 [dos]

Possible ATT&CK Techniques 1 AI

T1027 · Obfuscated Files or Information
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I. Basic Information for CVE-2016-8740

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache HTTP Server 拒绝服务漏洞
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 2.4.17至2.4.23版本的‘mod_http2’模块中存在安全漏洞，该漏洞源于当Protocols配置文件包含h2或h2c时，程序没有限制request-header长度。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（内存消耗）。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache HTTP Server 2.4.17 - 2.4.23 -

II. Public POCs for CVE-2016-8740

# POC Description Source Link Shenlong Link
1 Apache HTTP Server 2.4.23 vulnerability study (CVE-2016-8740) https://github.com/lcfpadilha/mac0352-ep4 POC Details
2 An implementation of CVE-2016-8740 https://github.com/jptr218/apachedos POC Details
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III. Intelligence Information for CVE-2016-8740

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Patches & Fixes for CVE-2016-8740 (1)

Vendor Advisories for CVE-2016-8740 (9)

Exploits & Public PoCs for CVE-2016-8740 (2)

Mailing List Discussions for CVE-2016-8740 (14)

Other References for CVE-2016-8740 (2)

IV. Related Vulnerabilities

Same product: Apache HTTP Server
Same vendor: Apache Software Foundation

V. Comments for CVE-2016-8740

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