{"id":"CVE-2026-19624","aliases":["DEBIAN-CVE-2026-19624","EUVD-2026-77774","GHSA-4533-c5f5-j3h9","UBUNTU-CVE-2026-19624"],"status":"published","title":"NetworkManager-l2tp: local privilege escalation via ipsec.conf injection","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0013,"percentile":0.02677,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-88"],"published":"2026-09-14T19:19:43Z","modified":"2026-10-28T10:50:32Z","fixes":[{"ecosystem":"Debian:12","package":"network-manager-l2tp","fixed_in":["1.20.8-1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"network-manager-l2tp","fixed_in":["1.20.20-2+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"network-manager-l2tp","fixed_in":["1.52.6-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.8-1+deb12u1"}]}],"versions":["1.20.8-1"]},{"source":"osv","ecosystem":"Debian:13","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.20-2+deb13u1"}]}],"versions":["1.20.20-2"]},{"source":"osv","ecosystem":"Debian:14","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.52.6-1"}]}],"versions":["1.20.20-2","1.52.0-1","1.52.0-2","1.52.2-1","1.52.4-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.8-1","1.2.8-2build1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.10-1","1.2.14-1","1.2.16-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.18-1build1","1.20.0-1","1.20.0-1build1","1.20.0-1build2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.8-1","1.20.10-1","1.20.12-1","1.20.12-1build1","1.20.12-1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.52.0-2","1.52.2-1","1.52.4-1","1.52.4-1build1","1.52.6-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"network-manager-l2tp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.20-2","1.52.0-2"]}],"products":[{"vendor":"fedora","product":"extra packages for enterprise linux (epel)"},{"vendor":"fedora","product":"fedora"}],"references":[{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd313f219110ef91c","tags":["patch","fix"]},{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce7627a04247cea673","tags":["patch","fix"]},{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp/releases","tags":["release-notes","advisory"]},{"url":"https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp","tags":["vendor-advisory","advisory"]},{"url":"https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19624","tags":["advisory"]},{"url":"https://linnemanlabs.com/posts/nm-l2tp-newline-to-root"},{"url":"https://github.com/advisories/GHSA-4533-c5f5-j3h9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19624.json","tags":["advisory"]},{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-19624","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-19624","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-19624","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-19624","title":"NetworkManager-l2tp: local privilege escalation via ipsec.conf injection","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T19:19:43.736Z","modified":"2026-09-14T19:43:32.531Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T13:47:17.512524Z"}],"euvd":[{"id":"EUVD-2026-77774","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T19:19:43Z","modified":"2026-09-14T19:43:32Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:28:19.383429Z"}],"ghsa":[{"id":"GHSA-4533-c5f5-j3h9","title":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection...","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T21:31:44Z","modified":"2026-09-14T21:31:45Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T15:11:52.325814Z"}],"nvd":[{"id":"CVE-2026-19624","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T20:16:43.593Z","modified":"2026-09-18T19:34:36.657Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T14:12:47.335523Z"}],"osv":[{"id":"CVE-2026-19624","title":"NetworkManager-l2tp: local privilege escalation via ipsec.conf injection","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T19:19:43.736Z","modified":"2026-10-28T10:50:32.706767497Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-88"],"updated_at":"2026-11-02T15:44:58.024074Z"},{"id":"DEBIAN-CVE-2026-19624","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T20:16:43.593Z","modified":"2026-10-01T12:00:08.144699979Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:53.097669Z"},{"id":"UBUNTU-CVE-2026-19624","description":"A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).","status":"published","published":"2026-09-14T20:16:00Z","modified":"2026-10-17T12:59:54.624741224Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:01.334185Z"}]}}