{"id":"USN-8196-1","summary":"strongswan vulnerabilities","details":"Haruto Kimura discovered that strongSwan incorrectly handled the\nsupported_versions extension in TLS. A remote attacker could possibly use\nthis issue to cause strongSwan to stop responding, resulting in a denial\nof service. (CVE-2026-35328)\n\nHaruto Kimura discovered that strongSwan incorrectly handled certain\nencrypted PKCS#7 containers. A remote attacker could possibly use this\nissue to cause strongSwan to crash, resulting in a denial of service.\n(CVE-2026-35329)\n\nLukas Johannes Moeller discovered that strongSwan incorrectly handled\ncertain EAP-SIM/AKA attributes. A remote attacker could use this issue to\ncause strongSwan to stop responding, resulting in a denial of service, or\npossibly execute arbitrary code. (CVE-2026-35330)\n\nHaruto Kimura discovered that strongSwan incorrectly handled processing of\nX.509 name constraints. A remote attacker could possibly use this issue to\nbypass excluded name constraints. (CVE-2026-35331)\n\nHaruto Kimura discovered that strongSwan incorrectly processed ECDH public\nvalues. A remote attacker could possibly use this issue to cause strongSwan\nto crash, resulting in a denial of service. (CVE-2026-35332)\n\nLukas Johannes Moeller discovered that strongSwan incorrectly handled\ncertain RADIUS attributes. A remote attacker could possibly use this issue\nto cause strongSwan to crash, resulting in a denial of service.\n(CVE-2026-35333)\n\nRyo Shimada discovered that strongSwan incorrectly handled RSA decryption.\nA remote attacker could possibly use this issue to cause strongSwan to\ncrash, resulting in a denial of service. (CVE-2026-35334)","modified":"2026-04-27T19:02:35.850034548Z","published":"2026-04-22T12:46:23Z","related":["UBUNTU-CVE-2026-35328","UBUNTU-CVE-2026-35329","UBUNTU-CVE-2026-35330","UBUNTU-CVE-2026-35331","UBUNTU-CVE-2026-35332","UBUNTU-CVE-2026-35333","UBUNTU-CVE-2026-35334"],"upstream":["CVE-2026-35328","CVE-2026-35329","CVE-2026-35330","CVE-2026-35331","CVE-2026-35332","CVE-2026-35333","CVE-2026-35334","UBUNTU-CVE-2026-35328","UBUNTU-CVE-2026-35329","UBUNTU-CVE-2026-35330","UBUNTU-CVE-2026-35331","UBUNTU-CVE-2026-35332","UBUNTU-CVE-2026-35333","UBUNTU-CVE-2026-35334"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8196-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35328"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35329"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35330"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35331"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35332"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35333"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-35334"}],"affected":[{"package":{"name":"strongswan","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/strongswan@5.9.5-2ubuntu2.6?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9.5-2ubuntu2.6"}]}],"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","5.9.5-2ubuntu2.5"],"ecosystem_specific":{"binaries":[{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"charon-cmd"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"charon-systemd"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"libcharon-extauth-plugins"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"libcharon-extra-plugins"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"libstrongswan"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"libstrongswan-extra-plugins"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"libstrongswan-standard-plugins"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-charon"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-libcharon"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-nm"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-pki"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-scepclient"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-starter"},{"binary_version":"5.9.5-2ubuntu2.6","binary_name":"strongswan-swanctl"}],"availability":"No 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