strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.
CVE-2015-4171 is a security vulnerability that . Impacting 4 products from strongswan, from canonical, from debian and 1 other, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2015-06-10T18:59:09.097
2025-04-12T10:46:40.837
Deferred
CVSSv2: 2.6 (LOW)
AV:N/AC:H/Au:N/C:P/I:N/A:N
4.9
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | strongswan | strongswan_vpn_client | ≤ 1.4.5 | Yes |
| Operating System | canonical | ubuntu_linux | 14.04 | Yes |
| Operating System | canonical | ubuntu_linux | 14.10 | Yes |
| Operating System | canonical | ubuntu_linux | 15.04 | Yes |
| Operating System | debian | debian_linux | 8.0 | Yes |
| Application | strongswan | strongswan | 4.3.0 | Yes |
| Application | strongswan | strongswan | 4.3.1 | Yes |
| Application | strongswan | strongswan | 4.3.2 | Yes |
| Application | strongswan | strongswan | 4.3.3 | Yes |
| Application | strongswan | strongswan | 4.3.4 | Yes |
| Application | strongswan | strongswan | 4.3.5 | Yes |
| Application | strongswan | strongswan | 4.3.6 | Yes |
| Application | strongswan | strongswan | 4.3.7 | Yes |
| Application | strongswan | strongswan | 4.4.0 | Yes |
| Application | strongswan | strongswan | 4.4.1 | Yes |
| Application | strongswan | strongswan | 4.5.0 | Yes |
| Application | strongswan | strongswan | 4.5.1 | Yes |
| Application | strongswan | strongswan | 4.5.2 | Yes |
| Application | strongswan | strongswan | 4.5.3 | Yes |
| Application | strongswan | strongswan | 4.6.0 | Yes |
| Application | strongswan | strongswan | 4.6.1 | Yes |
| Application | strongswan | strongswan | 4.6.2 | Yes |
| Application | strongswan | strongswan | 4.6.3 | Yes |
| Application | strongswan | strongswan | 4.6.4 | Yes |
| Application | strongswan | strongswan | 5.0.0 | Yes |
| Application | strongswan | strongswan | 5.0.1 | Yes |
| Application | strongswan | strongswan | 5.0.2 | Yes |
| Application | strongswan | strongswan | 5.0.3 | Yes |
| Application | strongswan | strongswan | 5.0.4 | Yes |
| Application | strongswan | strongswan | 5.1.0 | Yes |
| Application | strongswan | strongswan | 5.1.1 | Yes |
| Application | strongswan | strongswan | 5.1.2 | Yes |
| Application | strongswan | strongswan | 5.1.3 | Yes |
| Application | strongswan | strongswan | 5.2.0 | Yes |
| Application | strongswan | strongswan | 5.2.1 | Yes |
| Application | strongswan | strongswan | 5.2.2 | Yes |
| Application | strongswan | strongswan | 5.2.3 | Yes |
| Application | strongswan | strongswan | 5.3.0 | Yes |
| Application | strongswan | strongswan | 5.3.1 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For strongswan's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.