UBUNTU-CVE-2023-51764

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Source
https://ubuntu.com/security/CVE-2023-51764
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-51764.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2023-51764
Upstream
Downstream
Related
Published
2023-12-24T05:15:00Z
Modified
2025-09-08T16:56:37Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpddatarestrictions=rejectunauthpipelining and smtpddiscardehlokeywords=chunking (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required, such as the smtpdforbidbarenewline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9.

References

Affected packages

Ubuntu:Pro:14.04:LTS / postfix

Package

Name
postfix
Purl
pkg:deb/ubuntu/postfix@2.11.0-1ubuntu1.2+esm3?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.11.0-1ubuntu1.2+esm3

Affected versions

2.*

2.10.2-1
2.10.2-1build1
2.11.0-1
2.11.0-1ubuntu1
2.11.0-1ubuntu1.2
2.11.0-1ubuntu1.2+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "postfix",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name": "postfix-cdb",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name": "postfix-dev",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name": "postfix-ldap",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name": "postfix-mysql",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name": "postfix-pcre",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name": "postfix-pgsql",
            "binary_version": "2.11.0-1ubuntu1.2+esm3"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / postfix

Package

Name
postfix
Purl
pkg:deb/ubuntu/postfix@3.1.0-3ubuntu0.4+esm3?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.1.0-3ubuntu0.4+esm3

Affected versions

2.*

2.11.3-1ubuntu2
2.11.3-1ubuntu3

3.*

3.0.4-1ubuntu1
3.0.4-2
3.0.4-3
3.0.4-5
3.0.4-5build1
3.1.0-3
3.1.0-3ubuntu0.1
3.1.0-3ubuntu0.2
3.1.0-3ubuntu0.3
3.1.0-3ubuntu0.4
3.1.0-3ubuntu0.4+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "postfix",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-cdb",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-dev",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-ldap",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-mysql",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-pcre",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.1.0-3ubuntu0.4+esm3"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / postfix

Package

Name
postfix
Purl
pkg:deb/ubuntu/postfix@3.3.0-1ubuntu0.4+esm3?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.3.0-1ubuntu0.4+esm3

Affected versions

3.*

3.2.3-1
3.2.3-1build1
3.2.4-1
3.2.5-1
3.2.5-1build1
3.3.0-1
3.3.0-1ubuntu0.1
3.3.0-1ubuntu0.2
3.3.0-1ubuntu0.3
3.3.0-1ubuntu0.4
3.3.0-1ubuntu0.4+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "postfix",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-cdb",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-ldap",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-lmdb",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-mysql",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-pcre",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "postfix-sqlite",
            "binary_version": "3.3.0-1ubuntu0.4+esm3"
        }
    ]
}

Ubuntu:20.04:LTS / postfix

Package

Name
postfix
Purl
pkg:deb/ubuntu/postfix@3.4.13-0ubuntu1.4?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.13-0ubuntu1.4

Affected versions

3.*

3.4.5-1ubuntu1
3.4.7-1
3.4.7-2
3.4.8-1
3.4.9-1
3.4.10-1
3.4.10-1ubuntu1
3.4.13-0ubuntu1
3.4.13-0ubuntu1.1
3.4.13-0ubuntu1.2
3.4.13-0ubuntu1.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "postfix",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-cdb",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-ldap",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-lmdb",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-mysql",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-pcre",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.4.13-0ubuntu1.4"
        },
        {
            "binary_name": "postfix-sqlite",
            "binary_version": "3.4.13-0ubuntu1.4"
        }
    ]
}

Ubuntu:22.04:LTS / postfix

Package

Name
postfix
Purl
pkg:deb/ubuntu/postfix@3.6.4-1ubuntu1.3?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.6.4-1ubuntu1.3

Affected versions

3.*

3.5.6-1ubuntu2
3.5.13-1ubuntu1
3.5.13-1ubuntu2
3.5.13-1ubuntu3
3.6.3-4ubuntu1
3.6.3-5ubuntu1
3.6.3-5ubuntu2
3.6.4-1ubuntu1
3.6.4-1ubuntu1.1
3.6.4-1ubuntu1.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "postfix",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-cdb",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-ldap",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-lmdb",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-mysql",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-pcre",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-pgsql",
            "binary_version": "3.6.4-1ubuntu1.3"
        },
        {
            "binary_name": "postfix-sqlite",
            "binary_version": "3.6.4-1ubuntu1.3"
        }
    ]
}