High
netbeans — security advisory
There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in `webkit` subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6
- Products
- netbeans
- Affected versions
- 10.0-3ubuntu2~18.04.1, 10.0-3ubuntu3, 10.0-3~18.04.1ubuntu1, 12.1-3, 12.1-3build1, 8.0.2+dfsg1-4, 8.0.2+dfsg1-5, 8.1+dfsg1-1, 8.1+dfsg2-1, 8.1+dfsg2-3, 8.1+dfsg3-4
- Fixed versions
- Not specified
- CVEs
- CVE-2020-17534
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:51 UTC · Revision 1
Source evidence
There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in `webkit` subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6
osv:UBUNTU-CVE-2020-17534
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
netbeans
Fixed versions: Not specified
Complete source record
{
"id": "cd07e4702bab292f37dd0e3dc386bc8a69d9c6c6def4a18fbf85935912689983",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-17534",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-17534",
"summary": "There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in `webkit` subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6",
"evidence": "osv:UBUNTU-CVE-2020-17534",
"products": [
{
"name": {
"value": "netbeans",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.0.2+dfsg1-4",
"evidence": "/affected/0/versions"
},
{
"value": "8.0.2+dfsg1-5",
"evidence": "/affected/0/versions"
},
{
"value": "8.1+dfsg1-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.1+dfsg2-1",
"evidence": "/affected/0/versions"
},
{
"value": "8.1+dfsg2-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "8.1+dfsg3-4",
"evidence": "/affected/1/versions"
},
{
"value": "10.0-3~18.04.1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "10.0-3ubuntu2~18.04.1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "10.0-3ubuntu3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "12.1-3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "12.1-3",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "12.1-3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "12.1-3build1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "netbeans",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "12.1-3",
"evidence": "/affected/7/versions"
},
{
"value": "12.1-3build1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2020-17534",
"aliases": [
"UBUNTU-CVE-2020-17534"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"8.0.2+dfsg1-4",
"8.0.2+dfsg1-5",
"8.1+dfsg1-1",
"8.1+dfsg2-1",
"8.1+dfsg2-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "8.1+dfsg2-3"
},
{
"binary_name": "libnb-apisupport3-java",
"binary_version": "8.1+dfsg2-3"
},
{
"binary_name": "libnb-ide14-java",
"binary_version": "8.1+dfsg2-3"
},
{
"binary_name": "libnb-java5-java",
"binary_version": "8.1+dfsg2-3"
},
{
"binary_name": "netbeans",
"binary_version": "8.1+dfsg2-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"8.1+dfsg3-4",
"10.0-3~18.04.1ubuntu1",
"10.0-3ubuntu2~18.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "10.0-3ubuntu2~18.04.1"
},
{
"binary_name": "libnb-apisupport3-java",
"binary_version": "10.0-3ubuntu2~18.04.1"
},
{
"binary_name": "libnb-ide14-java",
"binary_version": "10.0-3ubuntu2~18.04.1"
},
{
"binary_name": "libnb-java5-java",
"binary_version": "10.0-3ubuntu2~18.04.1"
},
{
"binary_name": "netbeans",
"binary_version": "10.0-3ubuntu2~18.04.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"10.0-3ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "10.0-3ubuntu3"
},
{
"binary_name": "libnb-apisupport3-java",
"binary_version": "10.0-3ubuntu3"
},
{
"binary_name": "libnb-ide14-java",
"binary_version": "10.0-3ubuntu3"
},
{
"binary_name": "libnb-java5-java",
"binary_version": "10.0-3ubuntu3"
},
{
"binary_name": "netbeans",
"binary_version": "10.0-3ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"12.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "12.1-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"12.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "12.1-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"12.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "12.1-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"12.1-3build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "12.1-3build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netbeans",
"purl": "pkg:deb/ubuntu/netbeans?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"12.1-3",
"12.1-3build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-17534.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnb-absolutelayout-java",
"binary_version": "12.1-3build1"
}
]
}
}
],
"modified": "2026-10-17T12:56:11.996459065Z",
"provider": "osv",
"upstream": [
"CVE-2020-17534"
],
"references": [
"https://ubuntu.com/security/CVE-2020-17534",
"https://lists.apache.org/thread.html/ra6119c0cdfccf051a846fa11b61364f5df9e7db93c310706a947f86a%40%3Cdev.netbeans.apache.org%3E",
"https://www.cve.org/CVERecord?id=CVE-2020-17534"
]
},
"related_cves": [
{
"value": "CVE-2020-17534",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354942,
"published_at": "2021-01-11T16:15:00+00:00"
}