ubuntu-cve-2020-12872
Vulnerability from osv_ubuntu
Published
2020-05-15 19:15
Modified
2026-05-20 14:52
Summary
Details
yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
Severity
5.5 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.0.2-1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.0.2-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.0.2-1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.98-5",
"1.99-1",
"1.99-2",
"2.0.2-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.0.4+dfsg-2ubuntu0.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.4+dfsg-2",
"2.0.4+dfsg-2ubuntu0.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.0.7+dfsg-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.0.7+dfsg-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.6+dfsg-1",
"2.0.6+dfsg-3",
"2.0.7+dfsg-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.1.1+dfsg-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.1.1+dfsg-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.8+dfsg-3",
"2.0.9+dfsg-1",
"2.1.0+dfsg-1",
"2.1.1+dfsg-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.1.1+dfsg-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.1.1+dfsg-2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1.1+dfsg-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.2.0+dfsg-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.2.0+dfsg-2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.0+dfsg-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.2.0+dfsg-2build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws@2.2.0+dfsg-2build1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.0+dfsg-2",
"2.2.0+dfsg-2build1"
]
}
],
"aliases": [],
"details": "yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.",
"id": "UBUNTU-CVE-2020-12872",
"modified": "2026-05-20T14:52:09Z",
"published": "2020-05-15T19:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-12872"
},
{
"type": "REPORT",
"url": "https://medium.com/@charlielabs101/cve-2020-12872-df315411aa70"
},
{
"type": "REPORT",
"url": "https://github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_config.erl#L2068-L2075"
},
{
"type": "REPORT",
"url": "https://github.com/erlyaws/yaws/releases"
},
{
"type": "REPORT",
"url": "https://sweet32.info/"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-12872"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-12872"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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