ubuntu-cve-2020-20446
Vulnerability from osv_ubuntu
Published
2021-05-25 18:15
Modified
2026-04-22 07:39
Summary
Details
FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "ffmpeg",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libav-tools",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavcodec-extra",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavcodec-ffmpeg-extra56",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavcodec-ffmpeg56",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavdevice-ffmpeg56",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavfilter-ffmpeg5",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavformat-ffmpeg56",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavresample-ffmpeg2",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libavutil-ffmpeg54",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libpostproc-ffmpeg53",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libswresample-ffmpeg1",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
},
{
"binary_name": "libswscale-ffmpeg3",
"binary_version": "7:2.8.17-0ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "ffmpeg",
"purl": "pkg:deb/ubuntu/ffmpeg@7:2.8.17-0ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7:2.8.17-0ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7:2.7.2-1build1",
"7:2.8.1-1ubuntu1",
"7:2.8.2-1ubuntu1",
"7:2.8.3-1",
"7:2.8.4-1",
"7:2.8.4-1ubuntu1",
"7:2.8.4-1ubuntu2",
"7:2.8.4-1ubuntu3",
"7:2.8.4-1ubuntu4",
"7:2.8.6-1ubuntu1",
"7:2.8.6-1ubuntu2",
"7:2.8.8-0ubuntu0.16.04.1",
"7:2.8.10-0ubuntu0.16.04.1",
"7:2.8.11-0ubuntu0.16.04.1",
"7:2.8.14-0ubuntu0.16.04.1",
"7:2.8.15-0ubuntu0.16.04.1",
"7:2.8.15-0ubuntu0.16.04.1+esm1",
"7:2.8.17-0ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "ffmpeg",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavcodec-extra",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavcodec-extra57",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavcodec57",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavdevice57",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavfilter-extra",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavfilter-extra6",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavfilter6",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavformat57",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavresample3",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libavutil55",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libpostproc54",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libswresample2",
"binary_version": "7:3.4.11-0ubuntu0.1"
},
{
"binary_name": "libswscale4",
"binary_version": "7:3.4.11-0ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "ffmpeg",
"purl": "pkg:deb/ubuntu/ffmpeg@7:3.4.11-0ubuntu0.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7:3.4.11-0ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7:3.3.4-2",
"7:3.3.4-2build3",
"7:3.4-2ubuntu2",
"7:3.4-4",
"7:3.4-4build1",
"7:3.4.1-1",
"7:3.4.1-1build1",
"7:3.4.2-1",
"7:3.4.2-1build1",
"7:3.4.2-2",
"7:3.4.4-0ubuntu0.18.04.1",
"7:3.4.6-0ubuntu0.18.04.1",
"7:3.4.8-0ubuntu0.2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "ffmpeg",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavcodec-extra",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavcodec-extra58",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavcodec58",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavdevice58",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavfilter-extra",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavfilter-extra7",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavfilter7",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavformat58",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavresample4",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libavutil56",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libpostproc55",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libswresample3",
"binary_version": "7:4.2.7-0ubuntu0.1"
},
{
"binary_name": "libswscale5",
"binary_version": "7:4.2.7-0ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "ffmpeg",
"purl": "pkg:deb/ubuntu/ffmpeg@7:4.2.7-0ubuntu0.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "7:4.2.7-0ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7:4.1.4-1build2",
"7:4.2.1-2",
"7:4.2.1-2ubuntu1",
"7:4.2.2-1build1",
"7:4.2.2-1ubuntu1",
"7:4.2.4-1ubuntu0.1"
]
}
],
"aliases": [],
"details": "FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service.",
"id": "UBUNTU-CVE-2020-20446",
"modified": "2026-04-22T07:39:29Z",
"published": "2021-05-25T18:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-20446"
},
{
"type": "REPORT",
"url": "https://trac.ffmpeg.org/ticket/7995"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5472-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-20446"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5167-1"
}
],
"related": [
"USN-5472-1",
"USN-5167-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-20446"
]
}
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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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