{"schemaVersion":3,"id":"CVE-2018-7544","aliases":["UBUNTU-CVE-2018-7544","DEBIAN-CVE-2018-7544","openSUSE-SU-2024:11692-1"],"status":"published","duplicateOf":null,"title":null,"description":"A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a \"signal SIGTERM\" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning","dates":{"published":"2018-03-16T15:00:00.000Z","modified":"2024-11-14T20:46:28.947Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.1,"severity":"critical","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":9.1,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":6.4,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":9.1,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":10,"impact":8.7,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","score":9.1,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":10,"impact":8.7,"computed":true}]},"epss":{"probability":0.01785,"percentile":0.77985,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":-0.050000000000000044,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01835},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01691,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01785,"percentile":0.77985}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01691,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01835,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01785,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01785,"percentile":0.77985}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_F6197E9F507C4303","name":"Exploit Reference (blog.0xlabs.com)","source":"reference","url":"http://blog.0xlabs.com/2018/03/openvpn-remote-information-disclosure.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-134","name":"Use of Externally-Controlled Format String","description":"The product uses a function that accepts a format string as an argument, but the format string originates from an external source.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/134.html"}],"affected":[{"vendor":"debian","product":"openvpn","name":"openvpn","label":"openvpn","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/openvpn","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":null},{"vendor":"ubuntu","product":"openvpn","name":"openvpn","label":"openvpn","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openvpn","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":null},{"vendor":"openvpn","product":"openvpn","name":"OpenVPN","label":"openvpn","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 2.4.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2.4.5","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":"/vendor/openvpn/openvpn"},{"vendor":"opensuse","product":"openvpn&distro=openSUSE Tumbleweed","name":"openvpn","label":"openvpn&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/openvpn&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 2.5.4-2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.5.4-2.1","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openvpn","label":"OpenVPN","category":"app"}},"hubHref":null}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://blog.0xlabs.com/2018/03/openvpn-remote-information-disclosure.html","label":"blog.0xlabs.com/2018/03/openvpn-remote-information-disclosure.html","hostname":"blog.0xlabs.com","tags":["X Refsource MISC","Exploit","Third Party Advisory","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-7544","label":"ubuntu.com/security/CVE-2018-7544","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-7544","label":"www.cve.org/CVERecord?id=CVE-2018-7544","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-7544","label":"security-tracker.debian.org/tracker/CVE-2018-7544","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2018-7544","label":"www.suse.com/security/cve/CVE-2018-7544","hostname":"www.suse.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2021:0734-1","SUSE-SU-2021:14723-1","SUSE-SU-2021:1576-1","SUSE-SU-2021:1577-1"],"duplicates":[],"related":["OPENSUSE-SU-2021:0734-1","SUSE-SU-2021:14723-1","SUSE-SU-2021:1576-1","SUSE-SU-2021:1577-1"]},"timeline":[{"kind":"published","date":"2018-03-16T15:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-14T20:46:28.947Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T12:58:52.903Z","stale":false,"partial":false}}