UBUNTU-CVE-2021-21859 (CVE-2021-21859)
Vulnerability from osv_ubuntu – Published: 2021-08-16 20:15 – Updated: 2026-04-22 07:39 – Source website
VLAI
Details
An exploitable integer truncation vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The stri_box_read function is used when processing atoms using the 'stri' FOURCC code. An attacker can convince a user to open a video to trigger this vulnerability.
Severity
8.8 (High)
8.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gpac",
"binary_version": "0.5.0+svn4288~dfsg1-4ubuntu1+esm2"
},
{
"binary_name": "gpac-modules-base",
"binary_version": "0.5.0+svn4288~dfsg1-4ubuntu1+esm2"
},
{
"binary_name": "libgpac2",
"binary_version": "0.5.0+svn4288~dfsg1-4ubuntu1+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "gpac",
"purl": "pkg:deb/ubuntu/gpac@0.5.0+svn4288~dfsg1-4ubuntu1+esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.5.0+svn4288~dfsg1-1ubuntu1",
"0.5.0+svn4288~dfsg1-4",
"0.5.0+svn4288~dfsg1-4ubuntu1",
"0.5.0+svn4288~dfsg1-4ubuntu1+esm1",
"0.5.0+svn4288~dfsg1-4ubuntu1+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gpac",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1+esm2"
},
{
"binary_name": "gpac-modules-base",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1+esm2"
},
{
"binary_name": "libgpac4",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "gpac",
"purl": "pkg:deb/ubuntu/gpac@0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1+esm2?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.5.2-426-gc5ad4e4+dfsg5-1build1",
"0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1",
"0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gpac",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1+esm1"
},
{
"binary_name": "gpac-modules-base",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1+esm1"
},
{
"binary_name": "libgpac4",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "gpac",
"purl": "pkg:deb/ubuntu/gpac@0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.5.2-426-gc5ad4e4+dfsg5-3",
"0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1",
"0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gpac",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-5ubuntu0.1~esm2"
},
{
"binary_name": "gpac-modules-base",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-5ubuntu0.1~esm2"
},
{
"binary_name": "libgpac4",
"binary_version": "0.5.2-426-gc5ad4e4+dfsg5-5ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "gpac",
"purl": "pkg:deb/ubuntu/gpac@0.5.2-426-gc5ad4e4+dfsg5-5ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.5.2-426-gc5ad4e4+dfsg5-4ubuntu1",
"0.5.2-426-gc5ad4e4+dfsg5-5",
"0.5.2-426-gc5ad4e4+dfsg5-5ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gpac",
"binary_version": "2.0.0+dfsg1-2ubuntu0.1~esm2"
},
{
"binary_name": "gpac-modules-base",
"binary_version": "2.0.0+dfsg1-2ubuntu0.1~esm2"
},
{
"binary_name": "libgpac11",
"binary_version": "2.0.0+dfsg1-2ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "gpac",
"purl": "pkg:deb/ubuntu/gpac@2.0.0+dfsg1-2ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.1+dfsg1-4",
"1.0.1+dfsg1-5",
"2.0.0+dfsg1-2",
"2.0.0+dfsg1-2ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "gpac",
"binary_version": "2.2.1+dfsg1-3.1ubuntu0.1~esm2"
},
{
"binary_name": "gpac-modules-base",
"binary_version": "2.2.1+dfsg1-3.1ubuntu0.1~esm2"
},
{
"binary_name": "libgpac12t64",
"binary_version": "2.2.1+dfsg1-3.1ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "gpac",
"purl": "pkg:deb/ubuntu/gpac@2.2.1+dfsg1-3.1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.1+dfsg1-3",
"2.2.1+dfsg1-3.1",
"2.2.1+dfsg1-3.1build1",
"2.2.1+dfsg1-3.1build2",
"2.2.1+dfsg1-3.1ubuntu0.1~esm2"
]
}
],
"aliases": [],
"details": "An exploitable integer truncation vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The stri_box_read function is used when processing atoms using the \u0027stri\u0027 FOURCC code. An attacker can convince a user to open a video to trigger this vulnerability.",
"id": "UBUNTU-CVE-2021-21859",
"modified": "2026-04-22T07:39:55Z",
"published": "2021-08-16T20:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-21859"
},
{
"type": "REPORT",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1298"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-21859"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-21859"
]
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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