{"id":"CVE-2018-3968","aliases":["DEBIAN-CVE-2018-3968","EUVD-2018-15754","GHSA-xjmf-xr2j-gfx7","UBUNTU-CVE-2018-3968"],"status":"published","title":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from...","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","severity":{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-07","score":0.00276,"percentile":0.20104,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-347"],"published":"2019-03-21T16:36:03Z","modified":"2026-10-24T10:30:18Z","fixes":[{"ecosystem":"Debian:12","package":"u-boot","fixed_in":["2014.07+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"u-boot","fixed_in":["2014.07+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"u-boot","fixed_in":["2014.07+dfsg1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2014.07+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2014.07+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2014.07+dfsg1-1"}]}]}],"products":[{"vendor":"denx","product":"u-boot"}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2018-0633","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-3968"},{"url":"https://github.com/advisories/GHSA-xjmf-xr2j-gfx7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-3968","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-3968","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-3968","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-3968","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"published","published":"2019-03-21T16:36:03Z","modified":"2024-08-05T04:57:24.503Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:35:05.619113Z"}],"euvd":[{"id":"EUVD-2018-15754","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"published","published":"2019-03-21T16:36:03Z","modified":"2024-08-05T04:57:24Z","cvss":[{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T02:40:15.208866Z"}],"ghsa":[{"id":"GHSA-xjmf-xr2j-gfx7","title":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from...","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"published","published":"2022-05-13T01:01:50Z","modified":"2023-02-01T05:02:27Z","cvss":[{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:49:55.031123Z"}],"nvd":[{"id":"CVE-2018-3968","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"published","published":"2019-03-21T17:29:00.493Z","modified":"2026-06-17T01:58:08.01Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":4.4,"vector":"AV:L/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:04:55.136632Z"}],"osv":[{"id":"CVE-2018-3968","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"published","published":"2019-03-21T17:29:00.493Z","modified":"2026-10-24T10:30:18.880170899Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:09.442568Z"},{"id":"DEBIAN-CVE-2018-3968","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"published","published":"2019-03-21T17:29:00.493Z","modified":"2026-10-23T18:04:47.705042286Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:30.867575Z"},{"id":"UBUNTU-CVE-2018-3968","description":"An exploitable vulnerability exists in the verified boot protection of the Das U-Boot from version 2013.07-rc1 to 2014.07-rc2. The affected versions lack proper FIT signature enforcement, which allows an attacker to bypass U-Boot's verified boot and execute an unsigned kernel, embedded in a legacy image format. To trigger this vulnerability, a local attacker needs to be able to supply the image to boot.","status":"withdrawn","published":"2019-03-21T17:29:00Z","modified":"2025-07-16T07:38:40.720304Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.0","score":8.2,"vector":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"},{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:18.33562Z"}]}}