{"id":"CVE-2026-19624","state":"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).","publishedAt":"2026-09-14T19:19:43.736Z","updatedAt":"2026-09-14T19:43:32.531Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"fedora"},"assigner":"fedora","products":["NetworkManager-l2tp","Fedora Fedora","Fedora Extra Packages for Enterprise Linux (EPEL)"],"affected":[{"packageName":"NetworkManager-l2tp","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"1.0.16","versionType":"semver"},{"version":"1.2.0","status":"affected","lessThan":"1.2.22","versionType":"semver"},{"version":"1.8.0","status":"affected","lessThan":"1.8.10","versionType":"semver"},{"version":"1.20.0","status":"affected","lessThan":"1.20.24","versionType":"semver"},{"version":"1.52.0","status":"affected","lessThan":"1.52.4","versionType":"semver"}],"collectionURL":"https://github.com/nm-l2tp/NetworkManager-l2tp"},{"vendor":"Fedora","product":"Fedora","packageName":"NetworkManager-l2tp","defaultStatus":"unaffected","versions":[{"version":"1.52.0","status":"affected","lessThan":"1.52.4","versionType":"semver"}],"collectionURL":"https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp"},{"vendor":"Fedora","product":"Extra Packages for Enterprise Linux (EPEL)","packageName":"NetworkManager-l2tp","defaultStatus":"unaffected","versions":[{"version":"1.20.0","status":"affected","lessThan":"1.20.24","versionType":"semver"}],"collectionURL":"https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp"}],"references":["https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd313f219110ef91c","https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce7627a04247cea673","https://github.com/nm-l2tp/NetworkManager-l2tp/releases","https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp","https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/"],"weaknesses":["CWE-88"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/19xxx/CVE-2026-19624.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-19624","state":"PUBLISHED","datePublished":"2026-09-14T19:19:43.736Z","dateUpdated":"2026-09-14T19:43:32.531Z","assignerShortName":"fedora","assignerOrgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateReserved":"2026-08-12T14:50:47.790Z"},"containers":{"cna":{"title":"NetworkManager-l2tp: local privilege escalation via ipsec.conf injection","descriptions":[{"lang":"en","value":"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)."}],"affected":[{"packageName":"NetworkManager-l2tp","defaultStatus":"unaffected","versions":[{"version":"1.0.0","status":"affected","lessThan":"1.0.16","versionType":"semver"},{"version":"1.2.0","status":"affected","lessThan":"1.2.22","versionType":"semver"},{"version":"1.8.0","status":"affected","lessThan":"1.8.10","versionType":"semver"},{"version":"1.20.0","status":"affected","lessThan":"1.20.24","versionType":"semver"},{"version":"1.52.0","status":"affected","lessThan":"1.52.4","versionType":"semver"}],"collectionURL":"https://github.com/nm-l2tp/NetworkManager-l2tp"},{"vendor":"Fedora","product":"Fedora","packageName":"NetworkManager-l2tp","defaultStatus":"unaffected","versions":[{"version":"1.52.0","status":"affected","lessThan":"1.52.4","versionType":"semver"}],"collectionURL":"https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp"},{"vendor":"Fedora","product":"Extra Packages for Enterprise Linux (EPEL)","packageName":"NetworkManager-l2tp","defaultStatus":"unaffected","versions":[{"version":"1.20.0","status":"affected","lessThan":"1.20.24","versionType":"semver"}],"collectionURL":"https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp"}],"references":[{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd313f219110ef91c","tags":["patch"]},{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce7627a04247cea673","tags":["patch"]},{"url":"https://github.com/nm-l2tp/NetworkManager-l2tp/releases","tags":["release-notes"]},{"url":"https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp","tags":["vendor-advisory"]},{"url":"https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-88","lang":"en","type":"CWE","description":"Improper Control of an Argument of a Program Call ('Argument Injection')"}]}],"providerMetadata":{"shortName":"fedora","orgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateUpdated":"2026-09-14T19:19:43.736Z"},"credits":[{"lang":"en","value":"Keith Linneman (Linneman Labs)"}],"datePublic":"2026-09-03T00:00:00.000Z","x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-14T19:43:22.928124Z","id":"CVE-2026-19624","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-14T19:43:32.531Z"}}]}}}