{"id":"CVE-2023-32171","aliases":["EUVD-2023-36439","GHSA-97p9-ff9m-h6m4"],"status":"published","title":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability","description":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01356,"percentile":0.7201,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2024-05-03T01:56:48Z","modified":"2026-06-17T05:58:14Z","products":[{"vendor":"unified automation","product":"uagateway"},{"vendor":"unified-automation","product":"uagateway"}],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-23-776/","tags":["x_research-advisory","x_transferred","Third Party Advisory"]},{"url":"https://documentation.unified-automation.com/uagateway/1.5.14/CHANGELOG.txt","tags":["vendor-advisory","x_transferred","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32171"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-23-776"},{"url":"https://github.com/advisories/GHSA-97p9-ff9m-h6m4"}],"sources":{"cve":[{"id":"CVE-2023-32171","title":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability","description":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.","status":"published","published":"2024-05-03T01:56:48.684Z","modified":"2024-08-02T15:10:23.764Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:35:29.01154Z"}],"euvd":[{"id":"EUVD-2023-36439","description":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.","status":"published","published":"2024-05-03T01:56:48Z","modified":"2024-08-02T15:10:23Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T03:50:05.016714Z"}],"ghsa":[{"id":"GHSA-97p9-ff9m-h6m4","title":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service...","description":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.","status":"published","published":"2024-05-03T03:30:51Z","modified":"2024-05-03T03:31:12Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:57:16.682538Z"}],"nvd":[{"id":"CVE-2023-32171","description":"Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.","status":"published","published":"2024-05-03T02:15:22.593Z","modified":"2026-06-17T05:58:14.557Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:09:11.362739Z"}]}}