{"id":"CVE-2015-4171","aliases":["DEBIAN-CVE-2015-4171","DLA-244-1","DSA-3282-1","EUVD-2015-4194","GHSA-mg6m-fcfp-8xqm","SUSE-SU-2015:1196-1","SUSE-SU-2015:1227-1","SUSE-SU-2015:1791-1","UBUNTU-CVE-2015-4171","USN-2628-1","openSUSE-SU-2024:10579-1"],"status":"published","title":"strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP...","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.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02028,"percentile":0.8116,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2014-05-14T09:26:44Z","modified":"2026-09-09T06:47:32Z","fixes":[{"ecosystem":"Debian:12","package":"strongswan","fixed_in":["5.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"strongswan","fixed_in":["5.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"strongswan","fixed_in":["5.3.1-1"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"strongswan","fixed_in":["4.4.1-5.7"],"sources":["osv"]},{"ecosystem":"Debian:7","package":"strongswan","fixed_in":["4.5.2-1.5+deb7u7"],"sources":["osv"]},{"ecosystem":"Debian:8","package":"strongswan","fixed_in":["5.2.1-6+deb8u1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux 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SP4","package":"strongswan","fixed_in":["4.4.0-6.29.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"strongswan","fixed_in":["5.1.2-0ubuntu2.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"strongswan","fixed_in":["5.1.2-0ubuntu6"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.1-5.7"}]}],"versions":["4.4.1-5.1","4.4.1-5.2","4.4.1-5.3","4.4.1-5.4","4.4.1-5.5","4.4.1-5.6"]},{"source":"osv","ecosystem":"Debian:7","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.2-1.5+deb7u7"}]}],"versions":["4.5.2-1.5+deb7u1","4.5.2-1.5+deb7u2","4.5.2-1.5+deb7u2~bpo60+1","4.5.2-1.5+deb7u3","4.5.2-1.5+deb7u3~bpo60+1","4.5.2-1.5+deb7u4","4.5.2-1.5+deb7u6"]},{"source":"osv","ecosystem":"Debian:8","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.1-6+deb8u1"}]}],"versions":["5.2.1-6","5.2.1-6+deb8u1~bpo70+1"]},{"source":"osv","ecosystem":"SUSE:Linux 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SP4","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-6.29.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu2.3"}]}],"versions":["4.6.4-9","5.1.0-2","5.1.0-3","5.1.1-0ubuntu1","5.1.1-0ubuntu2","5.1.1-0ubuntu3","5.1.1-0ubuntu4","5.1.1-0ubuntu5","5.1.1-0ubuntu7","5.1.1-0ubuntu14","5.1.1-0ubuntu17","5.1.2~dr3+git20130120-0ubuntu2","5.1.2~dr3+git20130120-0ubuntu3","5.1.2~rc1-0ubuntu3","5.1.2~rc1-0ubuntu4","5.1.2~rc2-0ubuntu2","5.1.2-0ubuntu1","5.1.2-0ubuntu2","5.1.2-0ubuntu2.2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu6"}]}]},{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu2.3"}]}],"versions":["4.6.4-9","5.1.0-2","5.1.0-3","5.1.1-0ubuntu1","5.1.1-0ubuntu2","5.1.1-0ubuntu3","5.1.1-0ubuntu4","5.1.1-0ubuntu5","5.1.1-0ubuntu7","5.1.1-0ubuntu14","5.1.1-0ubuntu17","5.1.2~dr3+git20130120-0ubuntu2","5.1.2~dr3+git20130120-0ubuntu3","5.1.2~rc1-0ubuntu3","5.1.2~rc1-0ubuntu4","5.1.2~rc2-0ubuntu2","5.1.2-0ubuntu1","5.1.2-0ubuntu2","5.1.2-0ubuntu2.2"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"strongswan","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.5-1.1"}]}],"bundled":11}],"products":[{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"debian","product":"debian_linux"},{"vendor":"strongswan","product":"strongswan"},{"vendor":"strongswan","product":"strongswan_vpn_client"}],"references":[{"url":"http://www.securitytracker.com/id/1032514","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%2528cve-2015-4171%2529.html","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://lists.opensuse.org/opensuse-updates/2015-06/msg00040.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2015/06/08/4","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-4171.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2015/05/29/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","web","report"]},{"url":"http://www.openwall.com/lists/oss-security/2015/05/29/7","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://play.google.com/store/apps/details?id=org.strongswan.android","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://www.ubuntu.com/usn/USN-2628-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","Patch","fix"]},{"url":"http://www.debian.org/security/2015/dsa-3282","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Patch","fix"]},{"url":"http://www.securityfocus.com/bid/74933","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=933591","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-4171"},{"url":"https://github.com/advisories/GHSA-mg6m-fcfp-8xqm"},{"url":"https://security-tracker.debian.org/tracker/CVE-2015-4171","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20151196-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/933591","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2015-4171","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20151227-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/815236","tags":["report"]},{"url":"https://bugzilla.suse.com/833278","tags":["report"]},{"url":"https://bugzilla.suse.com/840826","tags":["report"]},{"url":"https://bugzilla.suse.com/847506","tags":["report"]},{"url":"https://bugzilla.suse.com/870572","tags":["report"]},{"url":"https://bugzilla.suse.com/876449","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2013-2944","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-5018","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-2338","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-2891","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20151791-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2015-4171","tags":["report"]},{"url":"https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%28cve-2015-4171%29.html","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2628-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2015-4171","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2009-0790","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-2388","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-6075","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-6076","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9221","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-3991","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-8023","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2015-4171","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.","status":"published","published":"2015-06-10T18:00:00Z","modified":"2024-08-06T06:04:03.021Z","updated_at":"2026-11-02T14:35:43.698357Z"}],"euvd":[{"id":"EUVD-2015-4194","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.","status":"published","published":"2015-06-10T18:00:00Z","modified":"2024-08-06T06:04:03Z","updated_at":"2026-11-03T02:22:05.081899Z"}],"ghsa":[{"id":"GHSA-mg6m-fcfp-8xqm","title":"strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP...","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.","status":"published","published":"2022-05-17T00:25:55Z","modified":"2023-02-03T05:01:44Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:53:01.625617Z"}],"nvd":[{"id":"CVE-2015-4171","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.","status":"published","published":"2015-06-10T18:59:09.097Z","modified":"2026-06-17T00:26:51.637Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:03:04.906059Z"}],"osv":[{"id":"CVE-2015-4171","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.","status":"published","published":"2015-06-10T18:59:09Z","modified":"2026-04-10T03:45:17.983796Z","updated_at":"2026-11-02T15:44:00.594921Z"},{"id":"DEBIAN-CVE-2015-4171","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.","status":"published","published":"2015-06-10T18:59:09.097Z","modified":"2026-09-09T06:47:32.456762502Z","updated_at":"2026-11-02T15:45:26.752992Z"},{"id":"DLA-244-1","title":"strongswan - security update","status":"published","published":"2015-06-11T00:00:00Z","modified":"2026-03-09T01:18:52.760238Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DSA-3282-1","title":"strongswan - security update","status":"published","published":"2015-06-08T00:00:00Z","modified":"2026-03-09T01:20:04.319605Z","updated_at":"2026-11-02T15:46:16.199525Z"},{"id":"openSUSE-SU-2024:10579-1","title":"strongswan-5.3.5-1.1 on GA media","description":"These are all security issues fixed in the strongswan-5.3.5-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:32:44.74643Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2015:1196-1","title":"Security update for strongswan","description":"Strongswan was updated to fix one security issue.\n\nThe following vulnerability was fixed:\n\n* CVE-2015-4171: Rogue servers were able to authenticate themselves with certificate issued by any CA the client trusts, to gain user credentials from a client in certain IKEv2 setups (bsc#933591)\n","status":"published","published":"2015-06-08T08:04:58Z","modified":"2026-02-04T02:57:25.228712Z","updated_at":"2026-11-02T15:53:43.030986Z"},{"id":"SUSE-SU-2015:1227-1","title":"Security update for strongswan","description":"\nThis update fixes a NULL ptr dereference (DoS) via ID_DER_ASN1_DN ID \npayloads.\n\nSecurity Issue reference:\n\n    * CVE-2014-2891\n      \u003chttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2891\u003e\n\n","status":"published","published":"2014-05-14T09:26:44Z","modified":"2026-02-04T02:26:22.617312Z","updated_at":"2026-11-02T15:53:43.030986Z"},{"id":"SUSE-SU-2015:1791-1","title":"Security update for strongswan","description":"strongswan was updated to fix one security issue.\n\t  \nThis security issue was fixed:\n- CVE-2015-4171: A problem that could enable rogue servers to gain user credentials from a client in certain IKEv2 setups. (bsc#933591)\n","status":"published","published":"2015-10-14T08:51:39Z","modified":"2026-02-04T02:24:22.298717Z","updated_at":"2026-11-02T15:53:43.030986Z"},{"id":"UBUNTU-CVE-2015-4171","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.","status":"published","published":"2015-06-08T12:00:00Z","modified":"2026-02-04T03:08:12.080497Z","updated_at":"2026-11-02T15:54:10.385269Z"},{"id":"USN-2628-1","title":"strongswan vulnerability","description":"Alexander E. Patrakov discovered that strongSwan incorrectly handled\ncertain IKEv2 setups. A malicious server could possibly use this issue to\nobtain user credentials.\n","status":"published","published":"2015-06-08T16:48:54Z","modified":"2026-02-10T04:40:54Z","updated_at":"2026-11-02T16:58:09.227524Z"}]}}