UnratedFix available
stunnel, stunnel4 — security advisory
stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter.
- Products
- stunnel, stunnel4
- Affected versions
- 3.10-0potato1, 3.22-1
- Fixed versions
- 2:3.24-1, 4.04-1
- CVEs
- CVE-2002-1563
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 20:13 UTC · Revision 1
Source evidence
stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter.
osv:DEBIAN-CVE-2002-1563
stunnel
Fixed versions: 2:3.24-1
stunnel4
Fixed versions: 4.04-1
stunnel4
Fixed versions: 4.04-1
Complete source record
{
"id": "6ee6b1f3abda4e7646d4649eac1c119689c006c7f3ed1b9be2465d66716d062f",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2002-1563",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2002-1563",
"summary": "stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter.",
"evidence": "osv:DEBIAN-CVE-2002-1563",
"products": [
{
"name": {
"value": "stunnel",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:3.24-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "3.10-0potato1",
"evidence": "/affected/0/versions"
},
{
"value": "3.22-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "stunnel4",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.04-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "stunnel4",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.04-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "DEBIAN-CVE-2002-1563",
"aliases": [
"DEBIAN-CVE-2002-1563"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:3.24-1"
}
]
}
],
"package": {
"name": "stunnel",
"purl": "pkg:deb/debian/stunnel?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.10-0potato1",
"3.22-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2002-1563.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.04-1"
}
]
}
],
"package": {
"name": "stunnel4",
"purl": "pkg:deb/debian/stunnel4?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2002-1563.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.04-1"
}
]
}
],
"package": {
"name": "stunnel4",
"purl": "pkg:deb/debian/stunnel4?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2002-1563.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-22T23:47:25.577017101Z",
"provider": "osv",
"upstream": [
"CVE-2002-1563"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2002-1563"
]
},
"related_cves": [
{
"value": "CVE-2002-1563",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 410500,
"published_at": "2003-05-12T04:00:00+00:00"
}