ubuntu-cve-2020-35766
Vulnerability from osv_ubuntu
Published
2020-12-28 20:15
Modified
2026-05-20 14:52
Summary
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.
Severity
7.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopendkim10",
"binary_version": "2.10.3-3build1"
},
{
"binary_name": "librbl1",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.10.3-3build1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.10.3-3build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopendkim11",
"binary_version": "2.11.0~alpha-11build1"
},
{
"binary_name": "librbl1",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.11.0~alpha-11build1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.11.0~alpha-10",
"2.11.0~alpha-11",
"2.11.0~alpha-11build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopendkim11",
"binary_version": "2.11.0~beta2-1"
},
{
"binary_name": "librbl1",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.11.0~beta2-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "libopendkim11",
"binary_version": "2.11.0~beta2-6"
},
{
"binary_name": "librbl1",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.11.0~beta2-6?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.11.0~beta2-4build1",
"2.11.0~beta2-5",
"2.11.0~beta2-6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopendkim11",
"binary_version": "2.11.0~beta2-9build4"
},
{
"binary_name": "librbl1",
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.11.0~beta2-9build4?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "libopendkim11",
"binary_version": "2.11.0~beta2-9.2"
},
{
"binary_name": "librbl1",
"binary_version": "2.11.0~beta2-9.2"
},
{
"binary_name": "libvbr2",
"binary_version": "2.11.0~beta2-9.2"
},
{
"binary_name": "miltertest",
"binary_version": "2.11.0~beta2-9.2"
},
{
"binary_name": "opendkim",
"binary_version": "2.11.0~beta2-9.2"
},
{
"binary_name": "opendkim-tools",
"binary_version": "2.11.0~beta2-9.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.11.0~beta2-9.2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.11.0~beta2-9.1",
"2.11.0~beta2-9.2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libopendkim11",
"binary_version": "2.11.0~beta2-9.2build1"
},
{
"binary_name": "librbl1",
"binary_version": "2.11.0~beta2-9.2build1"
},
{
"binary_name": "libvbr2",
"binary_version": "2.11.0~beta2-9.2build1"
},
{
"binary_name": "miltertest",
"binary_version": "2.11.0~beta2-9.2build1"
},
{
"binary_name": "opendkim",
"binary_version": "2.11.0~beta2-9.2build1"
},
{
"binary_name": "opendkim-tools",
"binary_version": "2.11.0~beta2-9.2build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "opendkim",
"purl": "pkg:deb/ubuntu/opendkim@2.11.0~beta2-9.2build1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.11.0~beta2-9.2",
"2.11.0~beta2-9.2build1"
]
}
],
"aliases": [],
"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.",
"id": "UBUNTU-CVE-2020-35766",
"modified": "2026-05-20T14:52:39Z",
"published": "2020-12-28T20:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-35766"
},
{
"type": "REPORT",
"url": "https://github.com/trusteddomainproject/OpenDKIM/issues/113"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-35766"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-35766"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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