CVE-2020-15705mediumCWE-347

CVE-2020-15705: medium-severity vulnerability in Ubuntu grub2 in Ubuntu

GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shim

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.4epss 1.4%
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.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected products
Ubuntu · grub2 in Ubuntu
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