{"id":"UBUNTU-CVE-2015-8023","details":"The server implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin in strongSwan 4.2.12 through 5.x before 5.3.4 does not properly validate local state, which allows remote attackers to bypass authentication via an empty Success message in response to an initial Challenge message.","modified":"2026-02-04T03:22:07.074156Z","published":"2015-11-16T12:00:00Z","related":["USN-2811-1"],"upstream":["CVE-2015-8023"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-8023"},{"type":"REPORT","url":"https://www.strongswan.org/blog/2015/11/16/strongswan-5.3.4-released.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2811-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-8023"}],"affected":[{"package":{"name":"strongswan","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/strongswan@5.1.2-0ubuntu2.4?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu2.4"}]}],"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","5.1.2-0ubuntu2.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"libstrongswan"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-ike"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-ikev1"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-ikev2"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-nm"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-af-alg"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-agent"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-attr-sql"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-certexpire"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-coupling"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-curl"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-dhcp"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-dnscert"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-dnskey"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-duplicheck"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-aka"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-aka-3gpp2"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-dynamic"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-gtc"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-md5"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-mschapv2"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-peap"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-radius"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-sim"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-sim-file"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-sim-pcsc"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-simaka-pseudonym"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-simaka-reauth"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-simaka-sql"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-tls"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-tnc"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-eap-ttls"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-error-notify"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-farp"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-fips-prf"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-gcrypt"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-gmp"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-ipseckey"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-kernel-libipsec"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-ldap"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-led"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-load-tester"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-lookip"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-mysql"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-ntru"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-openssl"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-pgp"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-pkcs11"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-pubkey"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-radattr"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-soup"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-sql"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-sqlite"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-sshkey"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-systime-fix"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-unbound"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-unity"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-whitelist"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-xauth-eap"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-xauth-generic"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-xauth-noauth"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-plugin-xauth-pam"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-pt-tls-client"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-starter"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-tnc-base"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-tnc-client"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-tnc-ifmap"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-tnc-pdp"},{"binary_version":"5.1.2-0ubuntu2.4","binary_name":"strongswan-tnc-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-8023.json"}},{"package":{"name":"strongswan","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/strongswan@5.1.2-0ubuntu7?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.1.2-0ubuntu7"}]}],"versions":["5.1.2-0ubuntu6"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"5.1.2-0ubuntu7","binary_name":"libstrongswan"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-ike"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-ikev1"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-ikev2"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-nm"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-af-alg"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-agent"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-attr-sql"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-certexpire"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-coupling"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-curl"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-dhcp"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-dnscert"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-dnskey"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-duplicheck"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-aka"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-aka-3gpp2"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-dynamic"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-gtc"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-md5"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-mschapv2"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-peap"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-radius"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-sim"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-sim-file"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-sim-pcsc"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-simaka-pseudonym"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-simaka-reauth"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-simaka-sql"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-tls"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-tnc"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-eap-ttls"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-error-notify"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-farp"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-fips-prf"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-gcrypt"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-gmp"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-ipseckey"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-kernel-libipsec"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-ldap"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-led"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-load-tester"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-lookip"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-mysql"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-ntru"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-openssl"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-pgp"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-pkcs11"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-pubkey"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-radattr"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-soup"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-sql"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-sqlite"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-sshkey"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-systime-fix"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-unbound"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-unity"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-whitelist"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-xauth-eap"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-xauth-generic"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-xauth-noauth"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-plugin-xauth-pam"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-pt-tls-client"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-starter"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-tnc-base"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-tnc-client"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-tnc-ifmap"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-tnc-pdp"},{"binary_version":"5.1.2-0ubuntu7","binary_name":"strongswan-tnc-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-8023.json"}}],"schema_version":"1.7.3","severity":[{"type":"Ubuntu","score":"medium"}]}