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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1522-1 strongswan security update
Debian DSA Debian DSA DSA-4305-1 strongswan security update
EUVD EUVD EUVD-2018-8007 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.
Ubuntu USN Ubuntu USN USN-3771-1 strongSwan vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 03 Dec 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-12-03T20:24:34.312Z

Reserved: 2018-08-29T00:00:00.000Z

Link: CVE-2018-16152

cve-icon Vulnrichment

Updated: 2024-08-05T10:17:38.160Z

cve-icon NVD

Status : Modified

Published: 2018-09-26T21:29:01.197

Modified: 2025-12-03T21:15:50.810

Link: CVE-2018-16152

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-09-24T00:00:00Z

Links: CVE-2018-16152 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses