---
title: "CVE-2018-8011: mod_md, DoS via Coredumps on specially… | CubePath"
description: "By specially crafting HTTP requests, the mod_md challenge handler would dereference a NULL pointer and cause the child process to segfault. This…"
language: en
source: https://cubepath.com/security/cve/CVE-2018-8011
---

# CVE-2018-8011: mod_md, DoS via Coredumps on specially… | CubePath

## 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).

Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-8011)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.55330 (55.3% probability)

Percentile

99.0%

Scores of

Nov 10, 2026

Model

v2026.06.15

## Affected products

Products listed in the CVE record, as the CNA published them.

- Apache HTTP Server

  - affected: Fixed in Apache HTTP Server 2.4.34 (Affected 2.4.33)

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [1041401](http://www.securitytracker.com/id/1041401)  (securitytracker.com) vdb-entry
- [security.netapp.com/advisory/ntap-20180926-0007](https://security.netapp.com/advisory/ntap-20180926-0007/)
- [httpd.apache.org/security/vulnerabilities\_24.html](https://httpd.apache.org/security/vulnerabilities%5F24.html#CVE-2018-8011)
- [\[httpd-cvs\] 20190815 svn commit: r1048743 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20190815 svn commit: r1048742 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20200401 svn commit: r1058586 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20200401 svn commit: r1058587 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073139 \[1/13\] - in /websites/staging/httpd/trunk/content: ./ security/json/](https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073143 \[3/3\] - in /websites/staging/httpd/trunk/content: ./ security/](https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073140 \[4/4\] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities\_13.html security/vulnerabilities\_20.html security/vulnerabilities\_22.html security/vulnerabilities\_24.html](https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073139 \[12/13\] - in /websites/staging/httpd/trunk/content: ./ security/json/](https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1888194 \[12/13\] - /httpd/site/trunk/content/security/json/](https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073149 \[1/13\] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/](https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210330 svn commit: r1073149 \[12/13\] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/](https://lists.apache.org/thread.html/re473305a65b4db888e3556e4dae10c2a04ee89dcff2e26ecdbd860a9%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list
- [\[httpd-cvs\] 20210606 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](https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E)  (lists.apache.org) mailing-list

## Timeline

1. ID reserved Mar 9, 2018
2. Record published Jul 18, 2018
3. Record last updated Sep 16, 2024

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)