UBUNTU-CVE-2020-13950

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Source
https://ubuntu.com/security/CVE-2020-13950
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13950.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-13950
Upstream
Downstream
Related
Published
2021-06-10T07:15:00Z
Modified
2025-07-16T07:40:48.361011Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

Apache HTTP Server versions 2.4.41 to 2.4.46 modproxyhttp can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service

References

Affected packages

Ubuntu:20.04:LTS / apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2@2.4.41-4ubuntu3.3?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.41-4ubuntu3.3

Affected versions

2.*

2.4.41-1ubuntu1
2.4.41-4ubuntu1
2.4.41-4ubuntu2
2.4.41-4ubuntu3
2.4.41-4ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "apache2",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-bin-dbgsym",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-data",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-dev",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-doc",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-ssl-dev",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-suexec-custom-dbgsym",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-suexec-pristine-dbgsym",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-utils-dbgsym",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.41-4ubuntu3.3"
        }
    ],
    "availability": "No subscription required"
}