ubuntu-cve-2018-8011
Vulnerability from osv_ubuntu
Published
2018-07-18 14:29
Modified
2025-07-16 04:53
Summary
Details
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).
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "apache2",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-bin",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-bin-dbgsym",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-data",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-dbg",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-dev",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-doc",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-mpm-event",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-mpm-itk",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-mpm-prefork",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-mpm-worker",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-suexec",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-suexec-custom",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-suexec-custom-dbgsym",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-suexec-pristine",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-suexec-pristine-dbgsym",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-utils",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2-utils-dbgsym",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "apache2.2-bin",
"binary_version": "2.4.7-1ubuntu4.20"
},
{
"binary_name": "libapache2-mod-macro",
"binary_version": "1:2.4.7-1ubuntu4.20"
},
{
"binary_name": "libapache2-mod-proxy-html",
"binary_version": "1:2.4.7-1ubuntu4.20"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "apache2",
"purl": "pkg:deb/ubuntu/apache2@2.4.7-1ubuntu4.20?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.7-1ubuntu4.20"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.6-2ubuntu2",
"2.4.6-2ubuntu3",
"2.4.6-2ubuntu4",
"2.4.7-1ubuntu1",
"2.4.7-1ubuntu2",
"2.4.7-1ubuntu3",
"2.4.7-1ubuntu4",
"2.4.7-1ubuntu4.1",
"2.4.7-1ubuntu4.4",
"2.4.7-1ubuntu4.5",
"2.4.7-1ubuntu4.6",
"2.4.7-1ubuntu4.7",
"2.4.7-1ubuntu4.8",
"2.4.7-1ubuntu4.9",
"2.4.7-1ubuntu4.10",
"2.4.7-1ubuntu4.11",
"2.4.7-1ubuntu4.13",
"2.4.7-1ubuntu4.15",
"2.4.7-1ubuntu4.16",
"2.4.7-1ubuntu4.17",
"2.4.7-1ubuntu4.18",
"2.4.7-1ubuntu4.19"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "apache2",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-bin",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-bin-dbgsym",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-data",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-dbg",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-dbgsym",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-dev",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-dev-dbgsym",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-doc",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-suexec-custom",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-suexec-custom-dbgsym",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-suexec-pristine",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-suexec-pristine-dbgsym",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-utils",
"binary_version": "2.4.18-2ubuntu3.9"
},
{
"binary_name": "apache2-utils-dbgsym",
"binary_version": "2.4.18-2ubuntu3.9"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "apache2",
"purl": "pkg:deb/ubuntu/apache2@2.4.18-2ubuntu3.9?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.18-2ubuntu3.9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.12-2ubuntu2",
"2.4.17-1ubuntu1",
"2.4.17-2ubuntu1",
"2.4.17-3ubuntu1",
"2.4.18-1ubuntu1",
"2.4.18-2ubuntu1",
"2.4.18-2ubuntu2",
"2.4.18-2ubuntu3",
"2.4.18-2ubuntu3.1",
"2.4.18-2ubuntu3.2",
"2.4.18-2ubuntu3.3",
"2.4.18-2ubuntu3.4",
"2.4.18-2ubuntu3.5",
"2.4.18-2ubuntu3.7",
"2.4.18-2ubuntu3.8"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "apache2",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-bin",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-data",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-dbg",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-dev",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-doc",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-ssl-dev",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-suexec-custom",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-suexec-pristine",
"binary_version": "2.4.29-1ubuntu4.2"
},
{
"binary_name": "apache2-utils",
"binary_version": "2.4.29-1ubuntu4.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "apache2",
"purl": "pkg:deb/ubuntu/apache2@2.4.29-1ubuntu4.2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.29-1ubuntu4.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.27-2ubuntu3",
"2.4.29-1ubuntu1",
"2.4.29-1ubuntu2",
"2.4.29-1ubuntu3",
"2.4.29-1ubuntu4",
"2.4.29-1ubuntu4.1"
]
}
],
"aliases": [],
"details": "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).",
"id": "UBUNTU-CVE-2018-8011",
"modified": "2025-07-16T04:53:39Z",
"published": "2018-07-18T14:29:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-8011"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2018/07/18/2"
},
{
"type": "REPORT",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2018-8011"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-8011"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2018-8011"
],
"withdrawn": "2025-07-18T16:44:32Z"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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