{"id":"CVE-2024-23744","aliases":["EUVD-2024-21200","GHSA-627f-4vcr-fmq4","UBUNTU-CVE-2024-23744"],"status":"published","title":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends...","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00685,"percentile":0.52872,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2024-01-21T00:00:00Z","modified":"2026-10-28T02:30:49Z","products":[{"vendor":"trustedfirmware","product":"mbed_tls"}],"references":[{"url":"https://github.com/Mbed-TLS/mbedtls/issues/8694","tags":["x_transferred","Exploit","Issue Tracking","Patch","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-23744","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-627f-4vcr-fmq4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/23xxx/CVE-2024-23744.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2024-23744","tags":["report"]},{"url":"https://github.com/Mbed-TLS/mbedtls/pull/8595","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-23744","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2024-23744","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","status":"published","published":"2024-01-21T00:00:00Z","modified":"2025-06-04T15:25:55.458Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:34:05.444281Z"}],"euvd":[{"id":"EUVD-2024-21200","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","status":"published","published":"2024-01-21T00:00:00Z","modified":"2025-06-04T15:25:55Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:30.107804Z"}],"ghsa":[{"id":"GHSA-627f-4vcr-fmq4","title":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends...","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","status":"published","published":"2024-01-22T00:30:19Z","modified":"2024-09-12T21:32:00Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:58:15.26738Z"}],"nvd":[{"id":"CVE-2024-23744","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","status":"published","published":"2024-01-21T23:15:44.833Z","modified":"2026-06-17T07:13:30.51Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:09:32.147098Z"}],"osv":[{"id":"CVE-2024-23744","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","status":"published","published":"2024-01-21T00:00:00Z","modified":"2026-10-28T02:30:49.704679733Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:38.897406Z"},{"id":"UBUNTU-CVE-2024-23744","description":"An issue was discovered in Mbed TLS 3.5.1. There is persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions.","status":"withdrawn","published":"2024-01-21T23:15:00Z","modified":"2025-09-08T16:59:02Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:54:42.68848Z"}]}}