curl — security advisory
lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
- Products
- curl
- Affected versions
- Not specified
- Fixed versions
- 7.19.5-1.1
- CVEs
- CVE-2009-2417
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 23:24 UTC · Revision 1
Source evidence
lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
osv:DEBIAN-CVE-2009-2417
curl
Fixed versions: 7.19.5-1.1
curl
Fixed versions: 7.19.5-1.1
curl
Fixed versions: 7.19.5-1.1
Complete source record
{
"id": "9d705897859df98c15bbcaa7c620c09d9513e11d6b8a92f5969ec522d165e94d",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2009-2417",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2009-2417",
"summary": "lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.",
"evidence": "osv:DEBIAN-CVE-2009-2417",
"products": [
{
"name": {
"value": "curl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.19.5-1.1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "curl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.19.5-1.1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "curl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.19.5-1.1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "DEBIAN-CVE-2009-2417",
"aliases": [
"DEBIAN-CVE-2009-2417"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.19.5-1.1"
}
]
}
],
"package": {
"name": "curl",
"purl": "pkg:deb/debian/curl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2417.json"
},
"ecosystem_specific": {
"urgency": "medium"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.19.5-1.1"
}
]
}
],
"package": {
"name": "curl",
"purl": "pkg:deb/debian/curl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2417.json"
},
"ecosystem_specific": {
"urgency": "medium"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.19.5-1.1"
}
]
}
],
"package": {
"name": "curl",
"purl": "pkg:deb/debian/curl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2009-2417.json"
},
"ecosystem_specific": {
"urgency": "medium"
}
}
],
"modified": "2026-10-23T17:47:42.878714060Z",
"provider": "osv",
"upstream": [
"CVE-2009-2417"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2009-2417"
]
},
"related_cves": [
{
"value": "CVE-2009-2417",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 418510,
"published_at": "2009-08-14T15:16:27.39+00:00"
}