Medium
nomacs — security advisory
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
- Products
- nomacs
- Affected versions
- 3.0.0+dfsg-1, 3.12.0+dfsg-2, 3.12.0+dfsg-2build1, 3.12.0+dfsg-3, 3.12.0+dfsg-3build2, 3.12.0+dfsg-3build3, 3.17.2206+dfsg-2build2, 3.17.2282+dfsg-2, 3.17.2282+dfsg-2build1, 3.17.2282+dfsg-2build2, 3.19.1+dfsg-1build1, 3.21.0+dfsg-2, 3.21.1+dfsg-1, 3.21.1+dfsg-1build1, 3.4.1+dfsg-11, 3.4.1+dfsg-11build1, 3.6.1+dfsg-4, 3.8.0+dfsg-1, 3.8.0+dfsg-4
- Fixed versions
- Not specified
- CVEs
- CVE-2020-23884
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:37 UTC · Revision 1
Source evidence
A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
osv:UBUNTU-CVE-2020-23884
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
nomacs
Fixed versions: Not specified
Complete source record
{
"id": "c5b978bbe72c2e5dc73a615624a9a9cc86553ae83b52e264b08801a8621182f1",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-23884",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-23884",
"summary": "A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.",
"evidence": "osv:UBUNTU-CVE-2020-23884",
"products": [
{
"name": {
"value": "nomacs",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.0.0+dfsg-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.4.1+dfsg-11",
"evidence": "/affected/1/versions"
},
{
"value": "3.4.1+dfsg-11build1",
"evidence": "/affected/1/versions"
},
{
"value": "3.6.1+dfsg-4",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.0+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.0+dfsg-4",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.12.0+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "3.12.0+dfsg-2build1",
"evidence": "/affected/2/versions"
},
{
"value": "3.12.0+dfsg-3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.12.0+dfsg-3build2",
"evidence": "/affected/3/versions"
},
{
"value": "3.12.0+dfsg-3build3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.17.2206+dfsg-2build2",
"evidence": "/affected/4/versions"
},
{
"value": "3.17.2282+dfsg-2",
"evidence": "/affected/4/versions"
},
{
"value": "3.17.2282+dfsg-2build1",
"evidence": "/affected/4/versions"
},
{
"value": "3.17.2282+dfsg-2build2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.19.1+dfsg-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "3.21.0+dfsg-2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.21.1+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "3.21.1+dfsg-1build1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "nomacs",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.21.0+dfsg-2",
"evidence": "/affected/7/versions"
},
{
"value": "3.21.1+dfsg-1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2020-23884",
"aliases": [
"UBUNTU-CVE-2020-23884"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"3.0.0+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.0.0+dfsg-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"3.4.1+dfsg-11",
"3.4.1+dfsg-11build1",
"3.6.1+dfsg-4",
"3.8.0+dfsg-1",
"3.8.0+dfsg-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.8.0+dfsg-4"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.8.0+dfsg-4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"3.12.0+dfsg-2",
"3.12.0+dfsg-2build1",
"3.12.0+dfsg-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.12.0+dfsg-3"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.12.0+dfsg-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"3.12.0+dfsg-3build2",
"3.12.0+dfsg-3build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.12.0+dfsg-3build3"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.12.0+dfsg-3build3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"3.17.2206+dfsg-2build2",
"3.17.2282+dfsg-2",
"3.17.2282+dfsg-2build1",
"3.17.2282+dfsg-2build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.17.2282+dfsg-2build2"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.17.2282+dfsg-2build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"3.19.1+dfsg-1build1",
"3.21.0+dfsg-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.21.0+dfsg-2"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.21.0+dfsg-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"3.21.1+dfsg-1",
"3.21.1+dfsg-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.21.1+dfsg-1build1"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.21.1+dfsg-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nomacs",
"purl": "pkg:deb/ubuntu/nomacs?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.21.0+dfsg-2",
"3.21.1+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "nomacs",
"binary_version": "3.21.1+dfsg-1"
},
{
"binary_name": "nomacs-l10n",
"binary_version": "3.21.1+dfsg-1"
}
]
}
}
],
"modified": "2026-10-17T12:55:52.235523836Z",
"provider": "osv",
"upstream": [
"CVE-2020-23884"
],
"references": [
"https://ubuntu.com/security/CVE-2020-23884",
"https://github.com/nomacs/nomacs/issues/516",
"https://github.com/Aurorainfinity/vulnerabilities/blob/master/nomacs/readme.md",
"https://nomacs.org/",
"https://www.cve.org/CVERecord?id=CVE-2020-23884"
]
},
"related_cves": [
{
"value": "CVE-2020-23884",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354187,
"published_at": "2021-11-10T22:15:00+00:00"
}