UBUNTU-CVE-2021-38084

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Source
https://ubuntu.com/security/CVE-2021-38084
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38084.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-38084
Upstream
Published
2021-08-03T22:15:00Z
Modified
2026-01-20T17:17:09.707993Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in the POP3 component of Courier Mail Server before 1.1.5. Meddler-in-the-middle attackers can pipeline commands after the POP3 STLS command, injecting plaintext commands into an encrypted user session.

References

Affected packages

Ubuntu:16.04:LTS / courier

Package

Name
courier
Purl
pkg:deb/ubuntu/courier@0.68.2-1ubuntu7?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.68.2-1ubuntu5
0.68.2-1ubuntu6
0.68.2-1ubuntu7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-base"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-faxmail"
        },
        {
            "binary_version": "4.10.0-20120615-1ubuntu7",
            "binary_name": "courier-imap"
        },
        {
            "binary_version": "4.10.0-20120615-1ubuntu7",
            "binary_name": "courier-imap-ssl"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-ldap"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-maildrop"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-mlm"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-mta"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-mta-ssl"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-pcp"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-pop"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-pop-ssl"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-ssl"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "courier-webadmin"
        },
        {
            "binary_version": "0.68.2-1ubuntu7",
            "binary_name": "sqwebmail"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38084.json"

Ubuntu:18.04:LTS / courier

Package

Name
courier
Purl
pkg:deb/ubuntu/courier@0.78.0-2ubuntu2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.78.0-2
0.78.0-2ubuntu1
0.78.0-2ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-base"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-faxmail"
        },
        {
            "binary_version": "4.18.1+0.78.0-2ubuntu2",
            "binary_name": "courier-imap"
        },
        {
            "binary_version": "4.18.1+0.78.0-2ubuntu2",
            "binary_name": "courier-imap-ssl"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-ldap"
        },
        {
            "binary_version": "2.9.1+0.78.0-2ubuntu2",
            "binary_name": "courier-maildrop"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-mlm"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-mta"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-mta-ssl"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-pcp"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-pop"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-pop-ssl"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-ssl"
        },
        {
            "binary_version": "0.78.0-2ubuntu2",
            "binary_name": "courier-webadmin"
        },
        {
            "binary_version": "5.9.0+0.78.0-2ubuntu2",
            "binary_name": "sqwebmail"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38084.json"

Ubuntu:20.04:LTS / courier

Package

Name
courier
Purl
pkg:deb/ubuntu/courier@1.0.6-1build2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.6-1build1
1.0.6-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-base"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-faxmail"
        },
        {
            "binary_version": "5.0.6+1.0.6-1build2",
            "binary_name": "courier-imap"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-ldap"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-mlm"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-mta"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-pcp"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-pop"
        },
        {
            "binary_version": "1.0.6-1build2",
            "binary_name": "courier-webadmin"
        },
        {
            "binary_version": "6.0.0+1.0.6-1build2",
            "binary_name": "sqwebmail"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38084.json"

Ubuntu:22.04:LTS / courier

Package

Name
courier
Purl
pkg:deb/ubuntu/courier@1.0.16-3build3?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.16-3build1
1.0.16-3build2
1.0.16-3build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-base"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-faxmail"
        },
        {
            "binary_version": "5.0.13+1.0.16-3build3",
            "binary_name": "courier-imap"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-ldap"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-mlm"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-mta"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-pcp"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-pop"
        },
        {
            "binary_version": "1.0.16-3build3",
            "binary_name": "courier-webadmin"
        },
        {
            "binary_version": "6.0.5+1.0.16-3build3",
            "binary_name": "sqwebmail"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38084.json"

Ubuntu:25.10 / courier

Package

Name
courier
Purl
pkg:deb/ubuntu/courier@1.4.1-3?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.3.13-11
1.4.1-1
1.4.1-2
1.4.1-2build1
1.4.1-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-base"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-faxmail"
        },
        {
            "binary_version": "5.2.11+1.4.1-3",
            "binary_name": "courier-imap"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-ldap"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-mlm"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-mta"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-pcp"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-pop"
        },
        {
            "binary_version": "1.4.1-3",
            "binary_name": "courier-webadmin"
        },
        {
            "binary_version": "6.2.9+1.4.1-3",
            "binary_name": "sqwebmail"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-38084.json"