{"id":"CVE-2025-61736","state":"PUBLISHED","title":"iSTAR- Improper Validation of Certificate Expiration","description":"Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires.","publishedAt":"2025-12-17T12:36:24.178Z","updatedAt":"2025-12-17T15:09:46.607Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"jci"},"assigner":"jci","products":["Johnson Controls iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE"],"affected":[{"vendor":"Johnson Controls","product":"iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE","defaultStatus":"affected","versions":[{"version":"iSTAR All versions prior to TLS 1.2","status":"affected"}]}],"references":["https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories","https://www.cisa.gov/news-events/ics-advisories/icsa-25-338-04"],"weaknesses":["CWE-298"],"ingestedAt":"2026-10-29T20:09:48.677Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/61xxx/CVE-2025-61736.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-61736","state":"PUBLISHED","datePublished":"2025-12-17T12:36:24.178Z","dateUpdated":"2025-12-17T15:09:46.607Z","assignerShortName":"jci","assignerOrgId":"7281d04a-a537-43df-bfb4-fa4110af9d01","dateReserved":"2025-09-30T15:51:17.096Z"},"containers":{"cna":{"title":"iSTAR- Improper Validation of Certificate Expiration","descriptions":[{"lang":"en","value":"Successful exploitation of this vulnerability could result in the product failing to re-establish communication once the certificate expires."}],"affected":[{"vendor":"Johnson Controls","product":"iSTAReX, iSTAR Edge, iSTAR Ultra LT, iSTAR Ultra , iSTAR Ultra SE","defaultStatus":"affected","versions":[{"version":"iSTAR All versions prior to TLS 1.2","status":"affected"}]}],"references":[{"url":"https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-25-338-04"}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7.1,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-298","description":"CWE-298-Improper Validation of certificate expiration","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"jci","orgId":"7281d04a-a537-43df-bfb4-fa4110af9d01","dateUpdated":"2025-12-17T12:36:24.178Z"},"datePublic":"2025-12-04T12:30:00.000Z","impacts":[{"capecId":"CAPEC-94","descriptions":[{"lang":"en","value":"CAPEC-94: Adversary in the Middle (AiTM)"}]}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"
Johnson Controls recommends the following mitigations:
Host-based certificates using TLS 1.2:
Quickest solution
No Upgrade required to specific C•CURE or iSTAR software/firmware versions
Requires downloading a new certificate to all iSTAR panels simultaneously, resulting in a brief system downtime
Convert encryption mode to TLS 1.3, per cluster:
Requires firmware 6.9.0 or higher, and C•CURE 9000 v2.90 SP3 or higher
Enables phased implementation by cluster, minimizing disruption
Note: TLS 1.3 is not supported on iSTAR eX, iSTAR Edge, and iSTAR Ultra LT panels
Upgrade legacy panels to new G2 hardware:
Recommended for smaller systems due to time constraints
Applies primarily to iSTAR eX, iSTAR Edge, and iSTAR LT panels
"}],"value":"Johnson Controls recommends the following mitigations:\n\nHost-based certificates using TLS 1.2:\n\n * Quickest solution\n * No Upgrade required to specific C•CURE or iSTAR software/firmware versions\n * Requires downloading a new certificate to all iSTAR panels simultaneously, resulting in a brief system downtime\n\n\nConvert encryption mode to TLS 1.3, per cluster:\n\n * Requires firmware 6.9.0 or higher, and C•CURE 9000 v2.90 SP3 or higher\n * Enables phased implementation by cluster, minimizing disruption\n * Note: TLS 1.3 is not supported on iSTAR eX, iSTAR Edge, and iSTAR Ultra LT panels\n\n\nUpgrade legacy panels to new G2 hardware:\n\n * Recommended for smaller systems due to time constraints\n * Applies primarily to iSTAR eX, iSTAR Edge, and iSTAR LT panels"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-17T15:07:21.695642Z","id":"CVE-2025-61736","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-17T15:09:46.607Z"}}]}}}