UnratedFix available
postfix — security advisory
The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/postfix/pid, which might allow local users to conduct symlink attacks that overwrite arbitrary files.
- Products
- postfix
- Affected versions
- Not specified
- Fixed versions
- 2.6.5-3
- CVEs
- CVE-2009-2939
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 23:00 UTC · Revision 1
Source evidence
The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/postfix/pid, which might allow local users to conduct symlink attacks that overwrite arbitrary files.
osv:DEBIAN-CVE-2009-2939
postfix
Fixed versions: 2.6.5-3
postfix
Fixed versions: 2.6.5-3
postfix
Fixed versions: 2.6.5-3
Complete source record
{
"id": "7114c573b00887c93753f1c7f62d5d8874aff445431a0476ff96bf48801ea9ef",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2009-2939",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2009-2939",
"summary": "The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/postfix/pid, which might allow local users to conduct symlink attacks that overwrite arbitrary files.",
"evidence": "osv:DEBIAN-CVE-2009-2939",
"products": [
{
"name": {
"value": "postfix",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.5-3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "postfix",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.5-3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "postfix",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.5-3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "DEBIAN-CVE-2009-2939",
"aliases": [
"DEBIAN-CVE-2009-2939"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.5-3"
}
]
}
],
"package": {
"name": "postfix",
"purl": "pkg:deb/debian/postfix?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2939.json"
},
"ecosystem_specific": {
"urgency": "low"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.5-3"
}
]
}
],
"package": {
"name": "postfix",
"purl": "pkg:deb/debian/postfix?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2939.json"
},
"ecosystem_specific": {
"urgency": "low"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.5-3"
}
]
}
],
"package": {
"name": "postfix",
"purl": "pkg:deb/debian/postfix?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2939.json"
},
"ecosystem_specific": {
"urgency": "low"
}
}
],
"modified": "2026-10-23T17:47:32.426841155Z",
"provider": "osv",
"upstream": [
"CVE-2009-2939"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2009-2939"
]
},
"related_cves": [
{
"value": "CVE-2009-2939",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 417509,
"published_at": "2009-09-21T19:30:00.39+00:00"
}