UBUNTU-CVE-2021-26690

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Source
https://ubuntu.com/security/CVE-2021-26690
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-26690.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-26690
Upstream
Downstream
Related
Published
2021-06-10T07:15:00Z
Modified
2025-09-08T16:47:00Z
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 - medium
Summary
[none]
Details

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service

References

Affected packages

Ubuntu:Pro:14.04:LTS / apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2@2.4.7-1ubuntu4.22+esm1?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.7-1ubuntu4.22+esm1

Affected versions

2.*

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
2.4.7-1ubuntu4.20
2.4.7-1ubuntu4.21
2.4.7-1ubuntu4.22

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "apache2",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-data",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-dev",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-mpm-event",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-mpm-itk",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-mpm-prefork",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-mpm-worker",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-suexec",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "apache2.2-bin",
            "binary_version": "2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "libapache2-mod-macro",
            "binary_version": "1:2.4.7-1ubuntu4.22+esm1"
        },
        {
            "binary_name": "libapache2-mod-proxy-html",
            "binary_version": "1:2.4.7-1ubuntu4.22+esm1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2@2.4.18-2ubuntu3.17+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.18-2ubuntu3.17+esm1

Affected versions

2.*

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
2.4.18-2ubuntu3.9
2.4.18-2ubuntu3.10
2.4.18-2ubuntu3.12
2.4.18-2ubuntu3.13
2.4.18-2ubuntu3.14
2.4.18-2ubuntu3.15
2.4.18-2ubuntu3.17

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "apache2",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        },
        {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        },
        {
            "binary_name": "apache2-data",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        },
        {
            "binary_name": "apache2-dev",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        },
        {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        },
        {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        },
        {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.18-2ubuntu3.17+esm1"
        }
    ]
}

Ubuntu:18.04:LTS / apache2

Package

Name
apache2
Purl
pkg:deb/ubuntu/apache2@2.4.29-1ubuntu4.16?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.29-1ubuntu4.16

Affected versions

2.*

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
2.4.29-1ubuntu4.2
2.4.29-1ubuntu4.3
2.4.29-1ubuntu4.4
2.4.29-1ubuntu4.5
2.4.29-1ubuntu4.6
2.4.29-1ubuntu4.7
2.4.29-1ubuntu4.8
2.4.29-1ubuntu4.10
2.4.29-1ubuntu4.11
2.4.29-1ubuntu4.12
2.4.29-1ubuntu4.13
2.4.29-1ubuntu4.14

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "apache2",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-data",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-dev",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-ssl-dev",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.29-1ubuntu4.16"
        },
        {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.29-1ubuntu4.16"
        }
    ]
}

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 

{
    "availability": "No subscription required",
    "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-data",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-dev",
            "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-pristine",
            "binary_version": "2.4.41-4ubuntu3.3"
        },
        {
            "binary_name": "apache2-utils",
            "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"
        }
    ]
}