{"id":"USN-8117-1","summary":"strongswan vulnerability","details":"Kazuma Matsumoto discovered that strongSwan incorrectly handled EAP-TTLS\nAVPs when using the eap-ttls plugin. An attacker could possibly use this\nissue to cause strongSwan to consume resources and crash, resulting in a\ndenial of service.","modified":"2026-04-27T18:45:29.442590Z","published":"2026-03-23T14:30:05Z","related":["UBUNTU-CVE-2026-25075"],"upstream":["CVE-2026-25075","UBUNTU-CVE-2026-25075"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8117-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-25075"}],"affected":[{"package":{"name":"strongswan","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/strongswan@5.9.5-2ubuntu2.5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9.5-2ubuntu2.5"}]}],"versions":["5.9.1-1ubuntu3","5.9.1-1ubuntu3.1","5.9.4-1ubuntu1","5.9.4-1ubuntu2","5.9.4-1ubuntu3","5.9.4-1ubuntu4","5.9.5-2ubuntu1","5.9.5-2ubuntu2","5.9.5-2ubuntu2.1","5.9.5-2ubuntu2.2","5.9.5-2ubuntu2.3","5.9.5-2ubuntu2.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"charon-cmd","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"charon-systemd","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"libcharon-extauth-plugins","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"libcharon-extra-plugins","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"libstrongswan","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"libstrongswan-extra-plugins","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"libstrongswan-standard-plugins","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-charon","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-libcharon","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-nm","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-pki","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-scepclient","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-starter","binary_version":"5.9.5-2ubuntu2.5"},{"binary_name":"strongswan-swanctl","binary_version":"5.9.5-2ubuntu2.5"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-25075","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8117-1.json"}},{"package":{"name":"strongswan","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/strongswan@5.9.13-2ubuntu4.24.04.2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9.13-2ubuntu4.24.04.2"}]}],"versions":["5.9.11-1ubuntu1","5.9.11-1ubuntu2","5.9.12-1ubuntu1","5.9.13-2ubuntu1","5.9.13-2ubuntu3","5.9.13-2ubuntu4","5.9.13-2ubuntu4.24.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"charon-cmd","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_version":"5.9.13-2ubuntu4.24.04.2","binary_name":"charon-systemd"},{"binary_name":"libcharon-extauth-plugins","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"libcharon-extra-plugins","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"libstrongswan","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"libstrongswan-extra-plugins","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"libstrongswan-standard-plugins","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_version":"5.9.13-2ubuntu4.24.04.2","binary_name":"strongswan"},{"binary_name":"strongswan-charon","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"strongswan-libcharon","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"strongswan-nm","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"strongswan-pki","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_name":"strongswan-starter","binary_version":"5.9.13-2ubuntu4.24.04.2"},{"binary_version":"5.9.13-2ubuntu4.24.04.2","binary_name":"strongswan-swanctl"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-25075","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8117-1.json"}},{"package":{"name":"strongswan","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/strongswan@6.0.1-6ubuntu4.2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.1-6ubuntu4.2"}]}],"versions":["5.9.13-2ubuntu4","5.9.13-2ubuntu5","6.0.1-6ubuntu2","6.0.1-6ubuntu4","6.0.1-6ubuntu4.1"],"ecosystem_specific":{"binaries":[{"binary_name":"charon-cmd","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"charon-systemd","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"libcharon-extauth-plugins","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"libcharon-extra-plugins","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"libstrongswan","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"libstrongswan-extra-plugins","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"libstrongswan-standard-plugins","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan-charon","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan-libcharon","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan-nm","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan-pki","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan-starter","binary_version":"6.0.1-6ubuntu4.2"},{"binary_name":"strongswan-swanctl","binary_version":"6.0.1-6ubuntu4.2"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-25075","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:25.10"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8117-1.json"}}],"schema_version":"1.7.5"}