{"schemaVersion":3,"id":"CVE-2023-24609","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Matrix SSL 4.x through 4.6.0 and Rambus TLS Toolkit have a length-subtraction integer overflow for Client Hello Pre-Shared Key extension parsing in the TLS 1.3 server. An attacked device calculates an SHA-2 hash over at least 65 KB (in RAM). With a large number of crafted TLS messages, the CPU becomes heavily loaded. This occurs in tls13VerifyBinder and tls13TranscriptHashUpdate.","dates":{"published":"2023-12-22T00:00:00.000Z","modified":"2024-08-02T11:03:18.963Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00731,"percentile":0.53753,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.00731},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00731,"percentile":0.53753}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00731,"percentile":null},{"date":"2026-10-1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Reference (telekom.com)","source":"reference","url":"https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-190","name":"Integer Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"}],"affected":[{"vendor":"matrixssl","product":"matrixssl","name":"matrixssl","label":"matrixssl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.0.0, ≤ 4.6.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.0.0, ≤ 4.6.0","eol":null,"hubHref":"/vendor/matrixssl/matrixssl"},{"vendor":"rambus","product":"tls_toolkit","name":"tls toolkit","label":"tls_toolkit","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/rambus/tls_toolkit"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842","label":"www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842","hostname":"www.telekom.com","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.rambus.com/security/software-protocols/tls-toolkit/","label":"www.rambus.com/security/software-protocols/tls-toolkit/","hostname":"www.rambus.com","tags":["Product"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-12-22T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-02T11:03:18.963Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":40,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T17:20:11.394Z","stale":false,"partial":false}}