UBUNTU-CVE-2021-23017

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Source
https://ubuntu.com/security/CVE-2021-23017
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23017.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-23017
Upstream
Downstream
Related
Published
2021-05-25T00:00:00Z
Modified
2025-09-08T16:46:59Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

References

Affected packages

Ubuntu:Pro:14.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx@1.4.6-1ubuntu3.9+esm2?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.4.6-1ubuntu3.9+esm2

Affected versions

1.*

1.4.1-3ubuntu1
1.4.3-2ubuntu1
1.4.4-1ubuntu1
1.4.4-2ubuntu1
1.4.4-4ubuntu1
1.4.5-1ubuntu1
1.4.6-1ubuntu2
1.4.6-1ubuntu3
1.4.6-1ubuntu3.1
1.4.6-1ubuntu3.2
1.4.6-1ubuntu3.3
1.4.6-1ubuntu3.4
1.4.6-1ubuntu3.5
1.4.6-1ubuntu3.6
1.4.6-1ubuntu3.7
1.4.6-1ubuntu3.8
1.4.6-1ubuntu3.9
1.4.6-1ubuntu3.9+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "nginx",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-naxsi",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        },
        {
            "binary_name": "nginx-naxsi-ui",
            "binary_version": "1.4.6-1ubuntu3.9+esm2"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx@1.10.3-0ubuntu0.16.04.5+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.10.3-0ubuntu0.16.04.5+esm1

Affected versions

1.*

1.9.3-1ubuntu1
1.9.6-2ubuntu1
1.9.6-2ubuntu2
1.9.9-0ubuntu1
1.9.9-1ubuntu1
1.9.10-0ubuntu1
1.9.10-1ubuntu1
1.9.11-0ubuntu1
1.9.11-0ubuntu2
1.9.12-0ubuntu1
1.9.13-0ubuntu1
1.9.14-0ubuntu1
1.9.15-0ubuntu1
1.10.0-0ubuntu0.16.04.1
1.10.0-0ubuntu0.16.04.2
1.10.0-0ubuntu0.16.04.3
1.10.0-0ubuntu0.16.04.4
1.10.3-0ubuntu0.16.04.1
1.10.3-0ubuntu0.16.04.2
1.10.3-0ubuntu0.16.04.3
1.10.3-0ubuntu0.16.04.4
1.10.3-0ubuntu0.16.04.5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "nginx",
            "binary_version": "1.10.3-0ubuntu0.16.04.5+esm1"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.10.3-0ubuntu0.16.04.5+esm1"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.10.3-0ubuntu0.16.04.5+esm1"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.10.3-0ubuntu0.16.04.5+esm1"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.10.3-0ubuntu0.16.04.5+esm1"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.10.3-0ubuntu0.16.04.5+esm1"
        }
    ]
}

Ubuntu:18.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx@1.14.0-0ubuntu1.9?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.14.0-0ubuntu1.9

Affected versions

1.*

1.12.1-0ubuntu2
1.13.6-2ubuntu1
1.13.6-2ubuntu2
1.13.10-1ubuntu1
1.13.12-0ubuntu1
1.14.0-0ubuntu1
1.14.0-0ubuntu1.1
1.14.0-0ubuntu1.2
1.14.0-0ubuntu1.3
1.14.0-0ubuntu1.4
1.14.0-0ubuntu1.5
1.14.0-0ubuntu1.6
1.14.0-0ubuntu1.7

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnginx-mod-http-auth-pam",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-cache-purge",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-dav-ext",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-echo",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-fancyindex",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-headers-more-filter",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-lua",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-ndk",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-subs-filter",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-uploadprogress",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-upstream-fair",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-nchan",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-rtmp",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "nginx",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.14.0-0ubuntu1.9"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.14.0-0ubuntu1.9"
        }
    ]
}

Ubuntu:20.04:LTS / nginx

Package

Name
nginx
Purl
pkg:deb/ubuntu/nginx@1.18.0-0ubuntu1.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.18.0-0ubuntu1.2

Affected versions

1.*

1.16.1-0ubuntu2
1.16.1-0ubuntu3
1.17.5-0ubuntu1
1.17.6-0ubuntu1
1.17.7-0ubuntu1
1.17.8-0ubuntu1
1.17.8-0ubuntu2
1.17.8-0ubuntu3
1.17.9-0ubuntu1
1.17.9-0ubuntu2
1.17.9-0ubuntu3
1.17.10-0ubuntu1
1.18.0-0ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libnginx-mod-http-auth-pam",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-cache-purge",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-dav-ext",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-echo",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-fancyindex",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-geoip2",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-headers-more-filter",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-lua",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-ndk",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-subs-filter",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-uploadprogress",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-upstream-fair",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-nchan",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-rtmp",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "nginx",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "nginx-common",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "nginx-core",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "nginx-extras",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "nginx-full",
            "binary_version": "1.18.0-0ubuntu1.2"
        },
        {
            "binary_name": "nginx-light",
            "binary_version": "1.18.0-0ubuntu1.2"
        }
    ]
}