{"schemaVersion":3,"id":"CVE-2023-30756","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-7 LTE (All versions < V3.5.20), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.5.20), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions), SIMATIC IPC DiagBase (All versions), SIMATIC IPC DiagMonitor (All versions), SIMATIC WinCC Runtime Advanced (All versions), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). The web server of the affected devices do not properly handle certain errors when using the Expect HTTP request header, resulting in NULL dereference.\n\nThis could allow a remote attacker with no privileges to cause a denial of service condition in the system.","dates":{"published":"2024-09-10T09:33:40.640Z","modified":"2024-09-10T15:10:00.273Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.2,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00453,"percentile":0.38006,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00453},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00453,"percentile":0.38006}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00453,"percentile":null},{"date":"2026-10-02T00:00:0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