{"id":"CVE-2019-17659","state":"PUBLISHED","title":"A use of hard-coded cryptographic key vulnerability in FortiSIEM version 5.2.6 may allow a remote unauthenticated attacker to obtain SSH access to the supervisor as the restricted ","description":"A use of hard-coded cryptographic key vulnerability in FortiSIEM version 5.2.6 may allow a remote unauthenticated attacker to obtain SSH access to the supervisor as the restricted user \"tunneluser\" by leveraging knowledge of the private key from another installation or a firmware image.","publishedAt":"2025-03-17T13:06:07.828Z","updatedAt":"2025-03-17T13:35:08.816Z","severity":{"score":3.6,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:F/RL:X/RC:X","source":"fortinet"},"assigner":"fortinet","products":["Fortinet FortiSIEM"],"affected":[{"vendor":"Fortinet","product":"FortiSIEM","defaultStatus":"unaffected","versions":[{"version":"5.2.6","status":"affected"}],"cpes":[]}],"references":["https://fortiguard.fortinet.com/psirt/FG-IR-19-296"],"weaknesses":["CWE-798"],"ingestedAt":"2026-10-29T19:45:38.896Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/17xxx/CVE-2019-17659.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2019-17659","state":"PUBLISHED","datePublished":"2025-03-17T13:06:07.828Z","dateUpdated":"2025-03-17T13:35:08.816Z","assignerShortName":"fortinet","assignerOrgId":"6abe59d8-c742-4dff-8ce8-9b0ca1073da8","dateReserved":"2019-10-16T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A use of hard-coded cryptographic key vulnerability in FortiSIEM version 5.2.6 may allow a remote unauthenticated attacker to obtain SSH access to the supervisor as the restricted user \"tunneluser\" by leveraging knowledge of the private key from another installation or a firmware image."}],"affected":[{"vendor":"Fortinet","product":"FortiSIEM","defaultStatus":"unaffected","versions":[{"version":"5.2.6","status":"affected"}],"cpes":[]}],"references":[{"url":"https://fortiguard.fortinet.com/psirt/FG-IR-19-296","name":"https://fortiguard.fortinet.com/psirt/FG-IR-19-296"}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.6,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:F/RL:X/RC:X"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-798","lang":"en","description":"Improper access control","type":"CWE"}]}],"providerMetadata":{"shortName":"fortinet","orgId":"6abe59d8-c742-4dff-8ce8-9b0ca1073da8","dateUpdated":"2025-03-17T13:06:07.828Z"},"solutions":[{"lang":"en","value":"Please upgrade to FortiSIEM version 5.2.7 and above where this issue is resolved. \r\nWorkaround (for FortiSIEM version 5.2.6 and lower): \r\nCustomers who are not using the reverse tunnel feature are advised to disable SSH service on port 19999  by following the steps below :\r\n1. SSH to the Supervisor node as the root user.\r\n2. Remove tunneluser SSH configuration file to disable listening on port 19999:\r\nrm -f /etc/ssh/sshd_config.tunneluser\r\necho rm -f /etc/ssh/sshd_config.tunneluser >> /etc/init.d/phProvision.sh\r\n3. Then terminate sshd running on TCP Port 19999 as follows:\r\npkill -f /usr/sbin/sshd -p 19999\r\n4.Additional steps can be performed on Supervisor to remove the keys associated with tunneluser account:\r\nrm -f /opt/phoenix/deployment/id_rsa.pub.tunneluser\r\nrm -f /home/tunneluser/.ssh/authorized_keys\r\nrm -f /opt/phoenix/id_rsa.tunneluser ~admin/.ssh/id_rsa\r\nCustomers are also advised to disable \"tunneluser\" SSH access on port 22 by following the steps bwlow:\r\n1. SSH to the Supervisor node as the root user.\r\n2. Add/edit the following line in sshd_config file: \r\necho DenyUsers tunneluser >>  /etc/ssh/sshd_config\r\n3. service sshd restart"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-03-17T13:35:01.135210Z","id":"CVE-2019-17659","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":"2025-03-17T13:35:08.816Z"}}]}}}