{"schemaVersion":3,"id":"CVE-2023-52353","aliases":["UBUNTU-CVE-2023-52353"],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered in Mbed TLS through 3.5.1. In mbedtls_ssl_session_reset, the maximum negotiable TLS version is mishandled. For example, if the last connection negotiated TLS 1.2, then 1.2 becomes the new maximum.","dates":{"published":"2024-01-21T00:00:00.000Z","modified":"2025-05-30T14:23:51.020Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":10,"impact":6,"computed":true},{"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:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00465,"percentile":0.39249,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.00465},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00465,"percentile":0.39249}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00465,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00465,"percentile":0.39249}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_MBED-TLS_MBEDTLS","name":"Mbedtls","source":"github","url":"https://github.com/Mbed-TLS/mbedtls/issues/8654","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-384","name":"Session Fixation","description":"Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.","type":"weakness","status":"Incomplete","abstraction":"Compound","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/384.html"}],"affected":[{"vendor":"arm","product":"mbed_tls","name":"mbed tls","label":"mbed_tls","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.5.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.5.2","eol":null,"hubHref":"/vendor/arm/mbed_tls"},{"vendor":"ubuntu","product":"mbedtls","name":"mbedtls","label":"mbedtls","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mbedtls","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/Mbed-TLS/mbedtls/issues/8654","label":"github.com/Mbed-TLS/mbedtls/issues/8654","hostname":"github.com","tags":["REPORT","Exploit","Issue Tracking","Patch"]},{"url":"https://ubuntu.com/security/CVE-2023-52353","label":"ubuntu.com/security/CVE-2023-52353","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-52353","label":"www.cve.org/CVERecord?id=CVE-2023-52353","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2024-01-21T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-05-30T14:23:51.020Z","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":"2026-10-22T15:45:06.010Z","stale":false,"partial":false}}