{"schemaVersion":3,"id":"CVE-2023-2758","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.","dates":{"published":"2023-05-31T14:09:49.809Z","modified":"2025-01-09T20:26:25.295Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","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:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0104,"percentile":0.63667,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.0104},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0104,"percentile":0.63667}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0104,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0104,"percentile":0.63667}]},"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":"REF_5607A686285F619C","name":"Exploit Reference (tenable.com)","source":"reference","url":"https://www.tenable.com/security/research/tra-2023-21","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-799","name":"Improper Control of Interaction Frequency","description":"The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/799.html"}],"affected":[{"vendor":"contec","product":"conprosys_hmi_system","name":"conprosys hmi system","label":"conprosys_hmi_system","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 3.5.2","noFixRecorded":false,"fixedIn":null},{"text":"< 3.5.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 3.5.2 | < 3.5.3","eol":null,"hubHref":"/vendor/contec/conprosys_hmi_system"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.tenable.com/security/research/tra-2023-21","label":"www.tenable.com/security/research/tra-2023-21","hostname":"www.tenable.com","tags":["Exploit","Third Party Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU93372935/index.html","label":"jvn.jp/en/vu/JVNVU93372935/index.html","hostname":"jvn.jp","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-05-31T14:09:49.809Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-01-09T20:26:25.295Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T17:47:54.363Z","stale":false,"partial":false}}