The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.
"}],"value":"The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","environmentalScore":6.5,"environmentalSeverity":"MEDIUM","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","temporalScore":6.5,"temporalSeverity":"MEDIUM","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-327","description":"CWE-327 Use of a Broken or Risky Cryptographic Algorithm","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"a6863dd2-93fc-443d-bef1-79f0b5020988","shortName":"SICK AG","dateUpdated":"2025-07-03T11:33:30.605Z"},"references":[{"tags":["x_Endress+Hauser"],"url":"https://www.endress.com"},{"tags":["x_SICK PSIRT Security Advisories"],"url":"https://sick.com/psirt"},{"tags":["x_ICS-CERT recommended practices on Industrial Security"],"url":"https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"},{"tags":["x_CVSS v3.1 Calculator"],"url":"https://www.first.org/cvss/calculator/3.1"},{"tags":["x_The canonical URL."],"url":"https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json"},{"tags":["vendor-advisory"],"url":"https://sick.com/psirt"},{"tags":["vendor-advisory"],"url":"https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf"}],"source":{"advisory":"SCA-2025-0008","discovery":"INTERNAL"},"title":"CVE-2025-27458","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Please make sure that you apply general security practices when operating the MEAC300-FNADE4. The following General Security Practices could mitigate the associated security risk.
"}],"value":"Please make sure that you apply general security practices when operating the MEAC300-FNADE4. The following General Security Practices could mitigate the associated security risk."}],"x_generator":{"engine":"csaf2cve 0.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-07-03T12:59:45.758774Z","id":"CVE-2025-27458","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-07-03T13:15:43.013Z"}}]}}