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Vulnerability details: VCID-qyuq-xfzf-eqc5
Vulnerability ID VCID-qyuq-xfzf-eqc5
Aliases CVE-2018-8011
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-8011.json
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
epss 0.3815 https://api.first.org/data/v1/epss?cve=CVE-2018-8011
cvssv3 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
apache_httpd moderate https://httpd.apache.org/security/json/CVE-2018-8011.json
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-8011
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-8011
archlinux Medium https://security.archlinux.org/AVG-736
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-8011.json
https://api.first.org/data/v1/epss?cve=CVE-2018-8011
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8011
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-8011
https://security.netapp.com/advisory/ntap-20180926-0007/
http://www.securitytracker.com/id/1041401
1605052 https://bugzilla.redhat.com/show_bug.cgi?id=1605052
904107 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=904107
ASA-201807-12 https://security.archlinux.org/ASA-201807-12
AVG-736 https://security.archlinux.org/AVG-736
cpe:2.3:a:apache:http_server:2.4.33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apache:http_server:2.4.33:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
CVE-2018-8011 https://httpd.apache.org/security/json/CVE-2018-8011.json
CVE-2018-8011 https://nvd.nist.gov/vuln/detail/CVE-2018-8011
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-8011.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-8011
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-8011
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.97079
EPSS Score 0.3815
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:05.412653+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2018-8011.json 37.0.0