{"id":"CVE-2021-34570","state":"PUBLISHED","title":"Phoenix Contact: DoS for PLCnext Control devices in versions prior to 2021.0.5 LTS","description":"Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests.","publishedAt":"2021-09-27T08:25:09.502Z","updatedAt":"2024-09-16T22:09:31.616Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CERTVDE"},"assigner":"CERTVDE","products":["Phoenix Contact AXC F","Phoenix Contact RFC","Phoenix Contact PLCnext"],"affected":[{"vendor":"Phoenix Contact","product":"AXC F","versions":[{"version":"AXC F 1152 (1151412)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"},{"version":"AXC F 2152 (2404267)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"},{"version":"AXC F 3152 (1069208)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"},{"version":"AXC F 2152 Starterkit (1046568)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"}]},{"vendor":"Phoenix Contact","product":"RFC","versions":[{"version":"RFC 4072S (1051328)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"}]},{"vendor":"Phoenix Contact","product":"PLCnext","versions":[{"version":"PLCnext Technology Starterkit (1188165)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"}]}],"references":["https://cert.vde.com/en/advisories/VDE-2021-029/"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T19:48:38.863Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/34xxx/CVE-2021-34570.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-34570","state":"PUBLISHED","datePublished":"2021-09-27T08:25:09.502Z","dateUpdated":"2024-09-16T22:09:31.616Z","assignerShortName":"CERTVDE","assignerOrgId":"270ccfa6-a436-4e77-922e-914ec3a9685c","dateReserved":"2021-06-10T00:00:00.000Z"},"containers":{"cna":{"title":"Phoenix Contact: DoS for PLCnext Control devices in versions prior to 2021.0.5 LTS","descriptions":[{"lang":"en","value":"Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests."}],"affected":[{"vendor":"Phoenix Contact","product":"AXC F","versions":[{"version":"AXC F 1152 (1151412)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"},{"version":"AXC F 2152 (2404267)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"},{"version":"AXC F 3152 (1069208)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"},{"version":"AXC F 2152 Starterkit (1046568)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"}]},{"vendor":"Phoenix Contact","product":"RFC","versions":[{"version":"RFC 4072S (1051328)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"}]},{"vendor":"Phoenix Contact","product":"PLCnext","versions":[{"version":"PLCnext Technology Starterkit (1188165)","status":"affected","lessThan":"2021.0.5 LTS","versionType":"custom"}]}],"references":[{"url":"https://cert.vde.com/en/advisories/VDE-2021-029/","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","description":"CWE-20 Improper Input Validation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERTVDE","dateUpdated":"2021-09-27T08:25:09.000Z","orgId":"270ccfa6-a436-4e77-922e-914ec3a9685c"},"credits":[{"lang":"en","value":"The vulnerability was discovered by Oliver Carrigan of Dionach. We kindly appreciate the coordinated disclosure of these vulnerabilities by the finder.  PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication."}],"datePublic":"2021-08-03T00:00:00.000Z","solutions":[{"lang":"en","value":"Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0.5 LTS or higher which fixes this vulnerability."}],"source":{"advisory":"VDE-2021-029","discovery":"EXTERNAL"},"workarounds":[{"lang":"en","value":"Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. 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