{"cve":"CVE-2015-4171","nvd":{"published":"2015-06-10T18:59:09.097","modified":"2026-06-17T00:26:51.637","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["http://lists.opensuse.org/opensuse-updates/2015-06/msg00040.html","http://www.debian.org/security/2015/dsa-3282","http://www.openwall.com/lists/oss-security/2015/05/29/6","http://www.openwall.com/lists/oss-security/2015/05/29/7","http://www.openwall.com/lists/oss-security/2015/06/08/4"],"products":["canonical:ubuntu_linux","debian:debian_linux","strongswan:strongswan","strongswan:strongswan_vpn_client"],"source":"nvd","synced_at":"2026-10-19T20:36:40.444340523+00:00"},"epss":{"cve":"CVE-2015-4171","score":0.02028,"percentile":0.81025,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}