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CVE-2018-8011— mod_md, DoS via Coredumps on specially crafted requests

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 2.4.33版本中存在安全漏洞。攻击者可通过发送特制的HTTP请求利用该漏洞造成拒绝服务（空指针逆向引用和段错误）。

AI Predicted 5.3 Difficulty: Easy EPSS 55.61% · P99
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I. Basic Information for CVE-2018-8011

Vulnerability Information
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Vulnerability Title
mod_md, DoS via Coredumps on specially crafted requests
Source: CVE Program / CVE List V5
Vulnerability Description
By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault. This could be used to DoS the server. Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.33).
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 安全漏洞
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 2.4.33版本中存在安全漏洞。攻击者可通过发送特制的HTTP请求利用该漏洞造成拒绝服务（空指针逆向引用和段错误）。
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 Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.33) -

II. Public POCs for CVE-2018-8011

# POC Description Source Link Shenlong Link
1 By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault. This could be used to DoS the server. Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.33) https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2018/CVE-2018-8011.yaml POC Details
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III. Intelligence Information for CVE-2018-8011

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Vendor Advisories for CVE-2018-8011 (3)

Mailing List Discussions for CVE-2018-8011 (12)

IV. Related Vulnerabilities

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

V. Comments for CVE-2018-8011

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