{"id":"CVE-2018-12395","state":"PUBLISHED","title":"By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that shar","description":"By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.","publishedAt":"2019-02-28T18:00:00.000Z","updatedAt":"2024-08-05T08:30:59.771Z","severity":null,"assigner":"mozilla","products":["Mozilla Firefox ESR","Mozilla Firefox"],"affected":[{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"60.3","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"63","versionType":"custom"}]}],"references":["https://www.debian.org/security/2018/dsa-4324","https://www.mozilla.org/security/advisories/mfsa2018-26/","https://security.gentoo.org/glsa/201811-04","https://www.mozilla.org/security/advisories/mfsa2018-27/","https://access.redhat.com/errata/RHSA-2018:3005","http://www.securityfocus.com/bid/105718","https://access.redhat.com/errata/RHSA-2018:3006","https://usn.ubuntu.com/3801-1/","https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html","http://www.securitytracker.com/id/1041944","https://bugzilla.mozilla.org/show_bug.cgi?id=1467523"],"weaknesses":[],"ingestedAt":"2026-10-29T19:44:15.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2018/12xxx/CVE-2018-12395.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2018-12395","state":"PUBLISHED","datePublished":"2019-02-28T18:00:00.000Z","dateUpdated":"2024-08-05T08:30:59.771Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2018-06-14T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63."}],"affected":[{"vendor":"Mozilla","product":"Firefox ESR","versions":[{"version":"unspecified","status":"affected","lessThan":"60.3","versionType":"custom"}]},{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"63","versionType":"custom"}]}],"references":[{"url":"https://www.debian.org/security/2018/dsa-4324","name":"DSA-4324","tags":["vendor-advisory","x_refsource_DEBIAN"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-26/","tags":["x_refsource_CONFIRM"]},{"url":"https://security.gentoo.org/glsa/201811-04","name":"GLSA-201811-04","tags":["vendor-advisory","x_refsource_GENTOO"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-27/","tags":["x_refsource_CONFIRM"]},{"url":"https://access.redhat.com/errata/RHSA-2018:3005","name":"RHSA-2018:3005","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"http://www.securityfocus.com/bid/105718","name":"105718","tags":["vdb-entry","x_refsource_BID"]},{"url":"https://access.redhat.com/errata/RHSA-2018:3006","name":"RHSA-2018:3006","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://usn.ubuntu.com/3801-1/","name":"USN-3801-1","tags":["vendor-advisory","x_refsource_UBUNTU"]},{"url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html","name":"[debian-lts-announce] 20181107 [SECURITY] [DLA 1571-1] firefox-esr security update","tags":["mailing-list","x_refsource_MLIST"]},{"url":"http://www.securitytracker.com/id/1041944","name":"1041944","tags":["vdb-entry","x_refsource_SECTRACK"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1467523","tags":["x_refsource_CONFIRM"]}],"problemTypes":[{"descriptions":[{"description":"WebExtension bypass of domain restrictions through header rewriting","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"mozilla","dateUpdated":"2019-03-01T10:57:01.000Z","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe"},"datePublic":"2019-02-28T00:00:00.000Z","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@mozilla.org","ID":"CVE-2018-12395","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Firefox ESR","version":{"version_data":[{"version_affected":"<","version_value":"60.3"}]}},{"product_name":"Firefox","version":{"version_data":[{"version_affected":"<","version_value":"63"}]}}]},"vendor_name":"Mozilla"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"WebExtension bypass of domain restrictions through header rewriting"}]}]},"references":{"reference_data":[{"name":"DSA-4324","refsource":"DEBIAN","url":"https://www.debian.org/security/2018/dsa-4324"},{"name":"https://www.mozilla.org/security/advisories/mfsa2018-26/","refsource":"CONFIRM","url":"https://www.mozilla.org/security/advisories/mfsa2018-26/"},{"name":"GLSA-201811-04","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/201811-04"},{"name":"https://www.mozilla.org/security/advisories/mfsa2018-27/","refsource":"CONFIRM","url":"https://www.mozilla.org/security/advisories/mfsa2018-27/"},{"name":"RHSA-2018:3005","refsource":"REDHAT","url":"https://access.redhat.com/errata/RHSA-2018:3005"},{"name":"105718","refsource":"BID","url":"http://www.securityfocus.com/bid/105718"},{"name":"RHSA-2018:3006","refsource":"REDHAT","url":"https://access.redhat.com/errata/RHSA-2018:3006"},{"name":"USN-3801-1","refsource":"UBUNTU","url":"https://usn.ubuntu.com/3801-1/"},{"name":"[debian-lts-announce] 20181107 [SECURITY] [DLA 1571-1] firefox-esr security update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html"},{"name":"1041944","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1041944"},{"name":"https://bugzilla.mozilla.org/show_bug.cgi?id=1467523","refsource":"CONFIRM","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1467523"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.debian.org/security/2018/dsa-4324","name":"DSA-4324","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-26/","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://security.gentoo.org/glsa/201811-04","name":"GLSA-201811-04","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2018-27/","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2018:3005","name":"RHSA-2018:3005","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"http://www.securityfocus.com/bid/105718","name":"105718","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2018:3006","name":"RHSA-2018:3006","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://usn.ubuntu.com/3801-1/","name":"USN-3801-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html","name":"[debian-lts-announce] 20181107 [SECURITY] [DLA 1571-1] firefox-esr security update","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.securitytracker.com/id/1041944","name":"1041944","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1467523","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-05T08:30:59.771Z"}}]}}}