{"id":"CVE-2023-48733","aliases":["DEBIAN-CVE-2023-48733","DLA-3852-1","DSA-5624-1","EUVD-2023-52766","GHSA-cjc8-gmgf-qv2g","UBUNTU-CVE-2023-48733","USN-6638-1","openSUSE-SU-2024:13807-1"],"status":"published","title":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an...","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","severity":{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00256,"percentile":0.17362,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1188"],"published":"2024-02-14T00:00:00Z","modified":"2026-10-28T02:30:48Z","fixes":[{"ecosystem":"Debian:12","package":"edk2","fixed_in":["2022.11-6+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"edk2","fixed_in":["2023.11-7"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"edk2","fixed_in":["2023.11-7"],"sources":["osv"]},{"ecosystem":"Debian:10","package":"edk2","fixed_in":["0~20181115.85588389-3+deb10u4"],"sources":["osv"]},{"ecosystem":"Debian:11","package":"edk2","fixed_in":["2020.11-2+deb11u2"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"edk2","fixed_in":["0~20191122.bd85bf54-2ubuntu3.5"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"edk2","fixed_in":["2022.02-3ubuntu0.22.04.2"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"ovmf","fixed_in":["202308-7.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.11-6+deb12u1"}]}],"versions":["2022.11-6"]},{"source":"osv","ecosystem":"Debian:13","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2023.11-7"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2023.11-7"}]}]},{"source":"osv","ecosystem":"Debian:10","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0~20181115.85588389-3+deb10u4"}]}],"versions":["0~20181115.85588389-3","0~20181115.85588389-3+deb10u1","0~20181115.85588389-3+deb10u2","0~20181115.85588389-3+deb10u3"]},{"source":"osv","ecosystem":"Debian:11","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.11-2+deb11u2"}]}],"versions":["2020.11-2","2020.11-2+deb11u1"]},{"source":"osv","ecosystem":"Debian:12","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.11-6+deb12u1"}]}],"versions":["2022.11-6"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20150106.5c2d456b-2","0~20160104.c2a892d7-1","0~20160408.ffea0a2c-2","0~20160408.ffea0a2c-2ubuntu0.1","0~20160408.ffea0a2c-2ubuntu0.2","0~20160408.ffea0a2c-2ubuntu0.2+esm1","0~20160408.ffea0a2c-2ubuntu0.2+esm3","0~20160408.ffea0a2c-2ubuntu0.2+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20170911.5dfba97c-1","0~20171010.234dbcef-1","0~20171027.76fd5a66-1","0~20171205.a9212288-1","0~20180105.0bc94c74-1","0~20180205.c0d9813c-1","0~20180205.c0d9813c-2","0~20180205.c0d9813c-2ubuntu0.1","0~20180205.c0d9813c-2ubuntu0.2","0~20180205.c0d9813c-2ubuntu0.3","0~20180205.c0d9813c-2ubuntu0.3+esm1","0~20180205.c0d9813c-2ubuntu0.3+esm2","0~20180205.c0d9813c-2ubuntu0.3+esm3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0~20191122.bd85bf54-2ubuntu3.5"}]}],"versions":["0~20190606.20d2e5a1-2ubuntu1","0~20190828.37eef910-3","0~20190828.37eef910-4","0~20191122.bd85bf54-1","0~20191122.bd85bf54-1ubuntu1","0~20191122.bd85bf54-2","0~20191122.bd85bf54-2ubuntu1","0~20191122.bd85bf54-2ubuntu2","0~20191122.bd85bf54-2ubuntu3","0~20191122.bd85bf54-2ubuntu3.1","0~20191122.bd85bf54-2ubuntu3.2","0~20191122.bd85bf54-2ubuntu3.3","0~20191122.bd85bf54-2ubuntu3.4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.02-3ubuntu0.22.04.2"}]}],"versions":["2021.08~rc0-2","2021.08-3","2021.11~rc1-1","2021.11-1","2021.11-2","2022.02~rc1-1","2022.02~rc1-1ubuntu1","2022.02-1","2022.02-2","2022.02-3","2022.02-3ubuntu0.22.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0~20191122.bd85bf54-2ubuntu3.5"}]}],"versions":["0~20190606.20d2e5a1-2ubuntu1","0~20190828.37eef910-3","0~20190828.37eef910-4","0~20191122.bd85bf54-1","0~20191122.bd85bf54-1ubuntu1","0~20191122.bd85bf54-2","0~20191122.bd85bf54-2ubuntu1","0~20191122.bd85bf54-2ubuntu2","0~20191122.bd85bf54-2ubuntu3","0~20191122.bd85bf54-2ubuntu3.1","0~20191122.bd85bf54-2ubuntu3.2","0~20191122.bd85bf54-2ubuntu3.3","0~20191122.bd85bf54-2ubuntu3.4"],"bundled":10},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2022.02-3ubuntu0.22.04.2"}]}],"versions":["2021.08~rc0-2","2021.08-3","2021.11~rc1-1","2021.11-1","2021.11-2","2022.02~rc1-1","2022.02~rc1-1ubuntu1","2022.02-1","2022.02-2","2022.02-3","2022.02-3ubuntu0.22.04.1"],"bundled":10},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"ovmf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202308-7.1"}]}]}],"products":[{"vendor":"canonical","product":"lxd"},{"vendor":"canonical ltd.","product":"ubuntu edk ii"},{"vendor":"debian","product":"debian_linux"},{"vendor":"tianocore","product":"edk2"}],"references":[{"url":"https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137","tags":["issue-tracking","x_transferred","Issue Tracking","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-48733","tags":["issue-tracking","x_transferred","Third Party Advisory","report"]},{"url":"https://www.openwall.com/lists/oss-security/2024/02/14/4","tags":["mailing-list","x_transferred","Mailing List","article","report"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139","tags":["issue-tracking","x_transferred","Issue Tracking","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00028.html","tags":["x_transferred","Mailing List","web"]},{"url":"https://github.com/advisories/GHSA-cjc8-gmgf-qv2g"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48733.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-48733","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-48733","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-6638-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-48733","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-36763","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-36764","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-36765","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-45230","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-45231","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-45232","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-45233","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-45234","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-45235","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2023-48733","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2023-48733","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-14T21:54:08.333Z","modified":"2025-05-08T15:18:23.545Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-1188"],"updated_at":"2026-11-02T14:35:26.261013Z"}],"euvd":[{"id":"EUVD-2023-52766","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-14T21:54:08Z","modified":"2025-05-08T15:18:23Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T20:32:52.039629Z"}],"ghsa":[{"id":"GHSA-cjc8-gmgf-qv2g","title":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an...","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-15T00:30:30Z","modified":"2025-05-08T18:31:34Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-1188"],"updated_at":"2026-11-02T15:02:12.439359Z"}],"nvd":[{"id":"CVE-2023-48733","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-14T22:15:47.32Z","modified":"2026-06-17T06:34:51.493Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-1188"],"updated_at":"2026-11-02T14:09:07.077422Z"}],"osv":[{"id":"CVE-2023-48733","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-14T21:54:08.333Z","modified":"2026-10-28T02:30:48.029852897Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:34.72355Z"},{"id":"DEBIAN-CVE-2023-48733","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-14T22:15:47.32Z","modified":"2026-10-26T18:03:07.095063509Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:40.275853Z"},{"id":"UBUNTU-CVE-2023-48733","description":"An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.","status":"published","published":"2024-02-14T00:00:00Z","modified":"2026-10-05T19:20:39.110256603Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T16:54:23.935133Z"},{"id":"DLA-3852-1","title":"edk2 - security update","status":"published","published":"2024-06-30T00:00:00Z","modified":"2026-03-09T02:10:46.477672Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"DSA-5624-1","title":"edk2 - security update","status":"published","published":"2024-02-14T00:00:00Z","modified":"2026-03-09T02:08:57.696583Z","updated_at":"2026-11-02T15:46:17.892347Z"},{"id":"openSUSE-SU-2024:13807-1","title":"ovmf-202308-7.1 on GA media","description":"These are all security issues fixed in the ovmf-202308-7.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2025-05-07T18:15:21.169862Z","updated_at":"2026-11-02T16:58:36.327643Z"},{"id":"USN-6638-1","title":"edk2 vulnerabilities","description":"Marc Beatove discovered buffer overflows exit in EDK2. An attacker on the\nlocal network could potentially use this to impact availability or possibly\ncause remote code execution. (CVE-2022-36763, CVE-2022-36764,\nCVE-2022-36765)\n\nIt was discovered that a buffer overflows exists in EDK2's Network Package\nAn attacker on the local network could potentially use these to impact\navailability or possibly cause remote code execution. (CVE-2023-45230,\nCVE-2023-45234, CVE-2023-45235)\n\nIt was discovered that an out-of-bounds read exists in EDK2's Network\nPackage An attacker on the local network could potentially use this to\nimpact confidentiality. (CVE-2023-45231)\n\nIt was discovered that infinite-loops exists in EDK2's Network Package\nAn attacker on the local network could potentially use these to impact\navailability. (CVE-2023-45232, CVE-2023-45233)\n\nMate Kukri discovered that an insecure default to allow UEFI Shell in\nEDK2 was left enabled in Ubuntu's EDK2. An attacker could use this to\nbypass Secure Boot. (CVE-2023-48733)\n","status":"published","published":"2024-02-15T01:36:15Z","modified":"2026-04-27T17:04:39.263284Z","updated_at":"2026-11-02T16:58:17.914523Z"}]}}