High
jss — security advisory
A flaw was found in JSS, where it did not properly free up all memory. Over time, the wasted memory builds up in the server memory, saturating the server’s RAM. This flaw allows an attacker to force the invocation of an out-of-memory process, causing a denial of service.
- Products
- jss
- Affected versions
- 4.3.1-6, 4.4.2-1, 4.4.2-2, 4.4.2-3, 4.4.2-6, 4.4.3-1, 4.6.1-3, 4.6.2-1, 4.6.3-1, 4.8.0-2, 5.0.0-1, 5.4.2-1, 5.5.0-1, 5.5.0-1build1, 5.9.0~beta3-3ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2021-4213
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:55 UTC · Revision 1
Source evidence
A flaw was found in JSS, where it did not properly free up all memory. Over time, the wasted memory builds up in the server memory, saturating the server’s RAM. This flaw allows an attacker to force the invocation of an out-of-memory process, causing a denial of service.
osv:UBUNTU-CVE-2021-4213
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
jss
Fixed versions: Not specified
Complete source record
{
"id": "3f259aae6addadac3dd223b697c24d067e4bcc866d827f54bd1772e5a87e7bd0",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-4213",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-4213",
"summary": "A flaw was found in JSS, where it did not properly free up all memory. Over time, the wasted memory builds up in the server memory, saturating the server’s RAM. This flaw allows an attacker to force the invocation of an out-of-memory process, causing a denial of service.",
"evidence": "osv:UBUNTU-CVE-2021-4213",
"products": [
{
"name": {
"value": "jss",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-6",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "jss",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.4.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.4.2-2",
"evidence": "/affected/1/versions"
},
{
"value": "4.4.2-3",
"evidence": "/affected/1/versions"
},
{
"value": "4.4.2-6",
"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
}
]
},
{
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},
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"affected_versions": [
{
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"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
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{
"name": {
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"evidence": "/affected/4/package/name"
},
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{
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"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
}
]
},
{
"name": {
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"evidence": "/affected/5/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/5/versions"
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]
},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/6/versions"
}
]
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/7/versions"
},
{
"value": "5.9.0~beta3-3ubuntu1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2021-4213",
"aliases": [
"UBUNTU-CVE-2021-4213"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jss",
"purl": "pkg:deb/ubuntu/jss?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"4.3.1-6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4213.json"
},
"ecosystem_specific": {
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{
"binary_name": "libjss-java",
"binary_version": "4.3.1-6"
}
]
}
},
{
"ranges": [
{
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}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/jss?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"4.4.2-1",
"4.4.2-2",
"4.4.2-3",
"4.4.2-6",
"4.4.3-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4213.json"
},
"ecosystem_specific": {
"binaries": [
{
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}
]
}
},
{
"ranges": [
{
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"events": [
{
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}
]
}
],
"package": {
"name": "jss",
"purl": "pkg:deb/ubuntu/jss?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"4.6.1-3",
"4.6.2-1",
"4.6.3-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4213.json"
},
"ecosystem_specific": {
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{
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}
]
}
},
{
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"package": {
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"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
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"5.0.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4213.json"
},
"ecosystem_specific": {
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},
{
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"package": {
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
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"5.5.0-1",
"5.5.0-1build1"
],
"database_specific": {
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},
"ecosystem_specific": {
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},
"versions": [
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],
"database_specific": {
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},
"ecosystem_specific": {
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},
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"ecosystem": "Ubuntu:26.10"
},
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],
"database_specific": {
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},
"ecosystem_specific": {
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{
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}
]
}
},
{
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],
"package": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"5.9.0~beta3-3ubuntu1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libjss-java",
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}
]
}
}
],
"modified": "2026-10-17T12:56:15.742044653Z",
"provider": "osv",
"upstream": [
"CVE-2021-4213"
],
"references": [
"https://ubuntu.com/security/CVE-2021-4213",
"https://bugzilla.redhat.com/show_bug.cgi?id=2042900",
"https://www.cve.org/CVERecord?id=CVE-2021-4213"
]
},
"related_cves": [
{
"value": "CVE-2021-4213",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355067,
"published_at": "2022-08-24T16:15:00+00:00"
}