{"id":"CVE-2018-8753","aliases":["EUVD-2018-20363","GHSA-fgp3-qvm3-xhqf"],"status":"published","title":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12...","description":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12.00.xx before 12.00.09 allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack.","severity":{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01634,"percentile":0.76427,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-08-15T18:00:00Z","modified":"2026-06-17T02:05:19Z","products":[{"vendor":"clavister","product":"cos_core"}],"references":[{"url":"https://web-in-security.blogspot.com/2018/08/practical-bleichenbacher-attacks-on-ipsec-ike.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.clavister.com/advisories/security/clav-sa-0157-bleichenbacher-oracle-vulnerability-in-ikev1","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8753"},{"url":"https://github.com/advisories/GHSA-fgp3-qvm3-xhqf"}],"sources":{"cve":[{"id":"CVE-2018-8753","description":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12.00.xx before 12.00.09 allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack.","status":"published","published":"2018-08-15T18:00:00Z","modified":"2024-08-05T07:02:26.036Z","updated_at":"2026-11-02T14:35:03.825765Z"}],"euvd":[{"id":"EUVD-2018-20363","description":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12.00.xx before 12.00.09 allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack.","status":"published","published":"2018-08-15T18:00:00Z","modified":"2024-08-05T07:02:26Z","updated_at":"2026-11-03T02:40:02.008103Z"}],"ghsa":[{"id":"GHSA-fgp3-qvm3-xhqf","title":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12...","description":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12.00.xx before 12.00.09 allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack.","status":"published","published":"2022-05-13T01:53:47Z","modified":"2023-02-02T05:02:24Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T14:51:26.066709Z"}],"nvd":[{"id":"CVE-2018-8753","description":"The IKEv1 implementation in Clavister cOS Core before 11.00.11, 11.20.xx before 11.20.06, and 12.00.xx before 12.00.09 allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack.","status":"published","published":"2018-08-15T18:29:01.043Z","modified":"2026-06-17T02:05:19.943Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:36.842579Z"}]}}