{"id":"CVE-2020-15705","details":"GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.","modified":"2026-04-16T04:37:38.272968131Z","published":"2020-07-29T18:15:14.187Z","related":["SUSE-SU-2020:14461-1","SUSE-SU-2020:2303-1","SUSE-SU-2020:2304-1","SUSE-SU-2020:2305-1","SUSE-SU-2020:2306-1","SUSE-SU-2020:2307-1","SUSE-SU-2020:2308-1","openSUSE-SU-2020:1280-1","openSUSE-SU-2020:1282-1","openSUSE-SU-2024:10824-1"],"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/03/02/3"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/09/17/2"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200731-0008/"},{"type":"ADVISORY","url":"https://www.suse.com/support/kb/doc/?id=000019673"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html"},{"type":"ADVISORY","url":"https://access.redhat.com/security/vulnerabilities/grub2bootloader"},{"type":"ADVISORY","url":"https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot"},{"type":"ADVISORY","url":"https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/"},{"type":"ADVISORY","url":"https://www.openwall.com/lists/oss-security/2020/07/29/3"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html"},{"type":"ADVISORY","url":"http://ubuntu.com/security/notices/USN-4432-1"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/07/29/3"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/09/17/4"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/09/21/1"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202104-05"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4432-1/"},{"type":"ADVISORY","url":"https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15705.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"2.04"}]},{"events":[{"introduced":"0"},{"last_affected":"4.0"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"20.04"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11"}]},{"events":[{"introduced":"0"},{"last_affected":"12"}]},{"events":[{"introduced":"0"},{"last_affected":"15"}]},{"events":[{"introduced":"0"},{"last_affected":"1607"}]},{"events":[{"introduced":"0"},{"last_affected":"1709"}]},{"events":[{"introduced":"0"},{"last_affected":"1803"}]},{"events":[{"introduced":"0"},{"last_affected":"1809"}]},{"events":[{"introduced":"0"},{"last_affected":"1903"}]},{"events":[{"introduced":"0"},{"last_affected":"1909"}]},{"events":[{"introduced":"0"},{"last_affected":"2004"}]},{"events":[{"introduced":"0"},{"last_affected":"r2"}]},{"events":[{"introduced":"0"},{"last_affected":"1903"}]},{"events":[{"introduced":"0"},{"last_affected":"1909"}]},{"events":[{"introduced":"0"},{"last_affected":"2004"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"}]}