Medium
libreswan, strongswan — security advisory
The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or brute force attacks. Reusing a key pair across different versions and modes of IKE could lead to cross-protocol authentication bypasses. It is well known, that the aggressive mode of IKEv1 PSK is vulnerable to offline dictionary or brute force attacks. For the main mode, however, only an online attack against PSK authentication was thought to be feasible. This vulnerability could allow an attacker to recover a weak Pre-Shared Key or enable the impersonation of a victim host or network.
- Products
- libreswan, strongswan
- Affected versions
- 4.10-2, 4.10-2+deb12u1, 4.11-1, 4.12-1, 4.12-2, 4.12-3, 4.14-1, 4.14-1.1, 4.15-1, 5.0~rc2-1, 5.0~rc2-2, 5.2-1, 5.2-2, 5.2-2.1, 5.2-2.2, 5.2-2.3, 5.2-2.4, 5.2-2.5, 5.9.11-1, 5.9.11-2, 5.9.12-1, 5.9.13-1, 5.9.13-2, 5.9.8-5, 5.9.8-5+deb12u1, 5.9.8-5+deb12u2, 5.9.8-5+deb12u3, 5.9.8-5+deb12u4, 5.9.8-5+deb12u5, 6.0.0-1, 6.0.0-2, 6.0.1-1, 6.0.1-2, 6.0.1-3, 6.0.1-4, 6.0.1-5, 6.0.1-6, 6.0.1-6+deb13u1, 6.0.1-6+deb13u2, 6.0.1-6+deb13u4, 6.0.1-6+deb13u5, 6.0.1-6+deb13u6, 6.0.1-6+deb13u7, 6.0.2-1, 6.0.3-1, 6.0.4-1, 6.0.5-1, 6.0.6-1, 6.0.7-1, 6.1.0-1, 6.1.0-2
- Fixed versions
- Not specified
- CVEs
- CVE-2018-5389
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:30 UTC · Revision 1
Source evidence
The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or brute force attacks. Reusing a key pair across different versions and modes of IKE could lead to cross-protocol authentication bypasses. It is well known, that the aggressive mode of IKEv1 PSK is vulnerable to offline dictionary or brute force attacks. For the main mode, however, only an online attack against PSK authentication was thought to be feasible. This vulnerability could allow an attacker to recover a weak Pre-Shared Key or enable the impersonation of a victim host or network.
osv:DEBIAN-CVE-2018-5389
libreswan
Fixed versions: Not specified
libreswan
Fixed versions: Not specified
libreswan
Fixed versions: Not specified
strongswan
Fixed versions: Not specified
strongswan
Fixed versions: Not specified
strongswan
Fixed versions: Not specified
Complete source record
{
"id": "72a6a8998fb5c4db5ab335e313ceca2063911d79f872e12cb46cdae9a2bff5bb",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-5389",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-5389",
"summary": "The Internet Key Exchange v1 main mode is vulnerable to offline dictionary or brute force attacks. Reusing a key pair across different versions and modes of IKE could lead to cross-protocol authentication bypasses. It is well known, that the aggressive mode of IKEv1 PSK is vulnerable to offline dictionary or brute force attacks. For the main mode, however, only an online attack against PSK authentication was thought to be feasible. This vulnerability could allow an attacker to recover a weak Pre-Shared Key or enable the impersonation of a victim host or network.",
"evidence": "osv:DEBIAN-CVE-2018-5389",
"products": [
{
"name": {
"value": "libreswan",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.10-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.10-2+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "4.11-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.12-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.12-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.12-3",
"evidence": "/affected/0/versions"
},
{
"value": "4.14-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.14-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "4.15-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.0~rc2-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.0~rc2-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-2.2",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-2.3",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-2.4",
"evidence": "/affected/0/versions"
},
{
"value": "5.2-2.5",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libreswan",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2-2.2",
"evidence": "/affected/1/versions"
},
{
"value": "5.2-2.3",
"evidence": "/affected/1/versions"
},
{
"value": "5.2-2.4",
"evidence": "/affected/1/versions"
},
{
"value": "5.2-2.5",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libreswan",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2-2.2",
"evidence": "/affected/2/versions"
},
{
"value": "5.2-2.3",
"evidence": "/affected/2/versions"
},
{
"value": "5.2-2.4",
"evidence": "/affected/2/versions"
},
{
"value": "5.2-2.5",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "strongswan",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.9.11-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.11-2",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.12-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.13-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.13-2",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.8-5",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.8-5+deb12u1",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.8-5+deb12u2",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.8-5+deb12u3",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.8-5+deb12u4",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.8-5+deb12u5",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.0-2",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.1-2",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.1-3",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.1-4",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.1-5",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.1-6",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.2-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.3-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.4-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.6-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.0.7-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.1.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "6.1.0-2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "strongswan",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.0.1-6",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.1-6+deb13u1",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.1-6+deb13u2",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.1-6+deb13u4",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.1-6+deb13u5",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.1-6+deb13u6",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.1-6+deb13u7",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.2-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.3-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.4-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.6-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.0.7-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.1.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.1.0-2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "strongswan",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.0.1-6",
"evidence": "/affected/5/versions"
},
{
"value": "6.0.2-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.0.3-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.0.4-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.0.5-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.0.6-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.0.7-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.1.0-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.1.0-2",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2018-5389",
"aliases": [
"DEBIAN-CVE-2018-5389"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libreswan",
"purl": "pkg:deb/debian/libreswan?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.10-2",
"4.10-2+deb12u1",
"4.11-1",
"4.12-1",
"4.12-2",
"4.12-3",
"4.14-1",
"4.14-1.1",
"4.15-1",
"5.0~rc2-1",
"5.0~rc2-2",
"5.2-1",
"5.2-2",
"5.2-2.1",
"5.2-2.2",
"5.2-2.3",
"5.2-2.4",
"5.2-2.5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5389.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libreswan",
"purl": "pkg:deb/debian/libreswan?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.2-2.2",
"5.2-2.3",
"5.2-2.4",
"5.2-2.5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5389.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libreswan",
"purl": "pkg:deb/debian/libreswan?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"5.2-2.2",
"5.2-2.3",
"5.2-2.4",
"5.2-2.5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5389.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:deb/debian/strongswan?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.9.11-1",
"5.9.11-2",
"5.9.12-1",
"5.9.13-1",
"5.9.13-2",
"5.9.8-5",
"5.9.8-5+deb12u1",
"5.9.8-5+deb12u2",
"5.9.8-5+deb12u3",
"5.9.8-5+deb12u4",
"5.9.8-5+deb12u5",
"6.0.0-1",
"6.0.0-2",
"6.0.1-1",
"6.0.1-2",
"6.0.1-3",
"6.0.1-4",
"6.0.1-5",
"6.0.1-6",
"6.0.2-1",
"6.0.3-1",
"6.0.4-1",
"6.0.5-1",
"6.0.6-1",
"6.0.7-1",
"6.1.0-1",
"6.1.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5389.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:deb/debian/strongswan?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.0.1-6",
"6.0.1-6+deb13u1",
"6.0.1-6+deb13u2",
"6.0.1-6+deb13u4",
"6.0.1-6+deb13u5",
"6.0.1-6+deb13u6",
"6.0.1-6+deb13u7",
"6.0.2-1",
"6.0.3-1",
"6.0.4-1",
"6.0.5-1",
"6.0.6-1",
"6.0.7-1",
"6.1.0-1",
"6.1.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5389.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:deb/debian/strongswan?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.0.1-6",
"6.0.2-1",
"6.0.3-1",
"6.0.4-1",
"6.0.5-1",
"6.0.6-1",
"6.0.7-1",
"6.1.0-1",
"6.1.0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-5389.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-23T18:03:22.288743975Z",
"provider": "osv",
"upstream": [
"CVE-2018-5389"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-5389"
]
},
"related_cves": [
{
"value": "CVE-2018-5389",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 421302,
"published_at": "2018-09-06T21:29:00.22+00:00"
}