UBUNTU-CVE-2020-35680

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Source
https://ubuntu.com/security/CVE-2020-35680
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-35680
Upstream
Published
2020-12-24T16:15:00Z
Modified
2026-05-20T16:04:28Z
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

smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer.

References

Affected packages

Ubuntu:20.04:LTS
opensmtpd

Package

Name
opensmtpd
Purl
pkg:deb/ubuntu/opensmtpd?arch=source&distro=focal

Affected ranges

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

Affected versions

6.*
6.0.3p1-6
6.0.3p1-6build1
6.6.1p1-1
6.6.1p1-3
6.6.1p1-4
6.6.1p1-5
6.6.2p1-1
6.6.4p1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensmtpd",
            "binary_version": "6.6.4p1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json"
Ubuntu:22.04:LTS
opensmtpd

Package

Name
opensmtpd
Purl
pkg:deb/ubuntu/opensmtpd?arch=source&distro=jammy

Affected ranges

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

Affected versions

6.*
6.8.0p2-3
6.8.0p2-4
6.8.0p2-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensmtpd",
            "binary_version": "6.8.0p2-4build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json"
Ubuntu:24.04:LTS
opensmtpd

Package

Name
opensmtpd
Purl
pkg:deb/ubuntu/opensmtpd?arch=source&distro=noble

Affected ranges

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

Affected versions

7.*
7.3.0p1-1
7.3.0p2-1
7.4.0p1-1
7.4.0p1-1build2
7.4.0p1-1build4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensmtpd",
            "binary_version": "7.4.0p1-1build4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json"
Ubuntu:25.10
opensmtpd

Package

Name
opensmtpd
Purl
pkg:deb/ubuntu/opensmtpd?arch=source&distro=questing

Affected ranges

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

Affected versions

7.*
7.5.0p0-1
7.7.0p0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensmtpd",
            "binary_version": "7.7.0p0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json"
Ubuntu:26.04:LTS
opensmtpd

Package

Name
opensmtpd
Purl
pkg:deb/ubuntu/opensmtpd?arch=source&distro=resolute

Affected ranges

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

Affected versions

7.*
7.7.0p0-1
7.8.0p0-1
7.8.0p0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensmtpd",
            "binary_version": "7.8.0p0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json"
Ubuntu:Pro:14.04:LTS
opensmtpd

Package

Name
opensmtpd
Purl
pkg:deb/ubuntu/opensmtpd?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

5.*
5.3.3p1-4
5.4.1p1-1
5.4.1p1-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensmtpd",
            "binary_version": "5.4.1p1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35680.json"