UBUNTU-CVE-2020-35766

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Source
https://ubuntu.com/security/CVE-2020-35766
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-35766.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-35766
Upstream
Published
2020-12-28T20:15:00Z
Modified
2025-09-08T16:46:32Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The test suite in libopendkim in OpenDKIM through 2.10.3 allows local users to gain privileges via a symlink attack against the /tmp/testkeys file (related to t-testdata.h, t-setup.c, and t-cleanup.c). NOTE: this is applicable to persons who choose to engage in the "A number of self-test programs are included here for unit-testing the library" situation.

References

Affected packages

Ubuntu:22.04:LTS

opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim@2.11.0~beta2-6?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*

2.11.0~beta2-4build1
2.11.0~beta2-5
2.11.0~beta2-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopendkim-dev",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "libopendkim11",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "librbl-dev",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "librbl1",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "libvbr-dev",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "libvbr2",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "miltertest",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "opendkim",
            "binary_version": "2.11.0~beta2-6"
        },
        {
            "binary_name": "opendkim-tools",
            "binary_version": "2.11.0~beta2-6"
        }
    ]
}

Ubuntu:24.04:LTS

opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim@2.11.0~beta2-9build4?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*

2.11.0~beta2-8
2.11.0~beta2-9
2.11.0~beta2-9build3
2.11.0~beta2-9build4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopendkim-dev",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "libopendkim11",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "librbl-dev",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "librbl1",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "libvbr-dev",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "libvbr2",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "miltertest",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "opendkim",
            "binary_version": "2.11.0~beta2-9build4"
        },
        {
            "binary_name": "opendkim-tools",
            "binary_version": "2.11.0~beta2-9build4"
        }
    ]
}

Ubuntu:25.04

opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim@2.11.0~beta2-9.1?arch=source&distro=plucky

Affected ranges

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

Affected versions

2.*

2.11.0~beta2-9.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopendkim-dev",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "libopendkim11",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "librbl-dev",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "librbl1",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "libvbr-dev",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "libvbr2",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "miltertest",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "opendkim",
            "binary_version": "2.11.0~beta2-9.1"
        },
        {
            "binary_name": "opendkim-tools",
            "binary_version": "2.11.0~beta2-9.1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim@2.10.3-3build1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

2.*

2.10.3-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopendkim-dev",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "libopendkim10",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "librbl-dev",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "librbl1",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "libvbr-dev",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "libvbr2",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "opendkim",
            "binary_version": "2.10.3-3build1"
        },
        {
            "binary_name": "opendkim-tools",
            "binary_version": "2.10.3-3build1"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim@2.11.0~alpha-11build1?arch=source&distro=esm-apps/bionic

Affected ranges

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

Affected versions

2.*

2.11.0~alpha-10
2.11.0~alpha-11
2.11.0~alpha-11build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopendkim-dev",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "libopendkim11",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "librbl-dev",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "librbl1",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "libvbr-dev",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "libvbr2",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "opendkim",
            "binary_version": "2.11.0~alpha-11build1"
        },
        {
            "binary_name": "opendkim-tools",
            "binary_version": "2.11.0~alpha-11build1"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

opendkim

Package

Name
opendkim
Purl
pkg:deb/ubuntu/opendkim@2.11.0~beta2-1?arch=source&distro=esm-apps/focal

Affected ranges

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

Affected versions

2.*

2.11.0~alpha-12
2.11.0~alpha-13
2.11.0~alpha-14
2.11.0~beta2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libopendkim-dev",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "libopendkim11",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "librbl-dev",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "librbl1",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "libvbr-dev",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "libvbr2",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "opendkim",
            "binary_version": "2.11.0~beta2-1"
        },
        {
            "binary_name": "opendkim-tools",
            "binary_version": "2.11.0~beta2-1"
        }
    ]
}