High
Security advisory
In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data in the digestAlgorithm.parameters field during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation when only an RSA signature is used for IKEv2 authentication. This is a variant of CVE-2006-4790 and CVE-2014-1568.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-16152
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:30 UTC · Revision 1
Source evidence
In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data in the digestAlgorithm.parameters field during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation when only an RSA signature is used for IKEv2 authentication. This is a variant of CVE-2006-4790 and CVE-2014-1568.
osv:CVE-2018-16152
Complete source record
{
"id": "e69a08d68a2522417321f288db74357cde9a37892131afff1d86fc8265bca2f1",
"url": "https://osv.dev/vulnerability/CVE-2018-16152",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-16152",
"summary": "In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data in the digestAlgorithm.parameters field during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation when only an RSA signature is used for IKEv2 authentication. This is a variant of CVE-2006-4790 and CVE-2014-1568.",
"evidence": "osv:CVE-2018-16152",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2018-16152",
"aliases": [
"CVE-2018-16152"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/strongswan/strongswan",
"type": "GIT",
"events": [
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"introduced": "8ba0404004ae9b36d74598a3f2212973fffb343a"
},
{
"last_affected": "b3bb991dc93324f52f52216d5a1460a865016c76"
},
{
"introduced": "1e5634c9b3eaad5231ad4a90c394c5589fb2a387"
},
{
"fixed": "2a327d438ce526b078fb1e93402c7394a78c408c"
}
],
"database_specific": {
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{
"cpe": "cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0"
},
{
"last_affected": "4.6.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*",
"range": [
{
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{
"fixed": "5.7.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16152.json"
}
}
],
"modified": "2026-10-24T10:30:19.354545094Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2018/09/msg00032.html",
"https://security.gentoo.org/glsa/201811-16",
"https://usn.ubuntu.com/3771-1/",
"https://www.debian.org/security/2018/dsa-4305",
"https://www.strongswan.org/blog/2018/09/24/strongswan-vulnerability-%28cve-2018-16151%2C-cve-2018-16152%29.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
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"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
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},
{
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},
{
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}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-16152",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429994,
"published_at": "2018-09-26T21:29:01.197+00:00"
}