PT-2020-6737 · Grub2+7 · Grub2+7
Mathieu Trudel-Lapierre
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Published
2020-07-29
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Updated
2025-04-07
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CVE-2020-15705
CVSS v3.1
6.4
Medium
| Vector | AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
GRUB2 versions 2.04 and prior
Description
The issue is related to an incorrect validation of cryptographic signatures in the GRUB2 bootloader, which can allow an attacker to bypass secure boot and execute arbitrary code, gaining full control over the device. This affects systems where the kernel signing certificate is directly imported into the secure boot database and the GRUB image is booted without the use of shim.
Recommendations
For GRUB2 versions 2.04 and prior, consider updating to a version that includes the fix for this issue, as the current version allows secure boot to be bypassed when booted directly without shim.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Improper Verification of Cryptographic Signature
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Related Identifiers
Affected Products
Alt Linux
Centos
Grub2
Linuxmint
Red Hat
Red Os
Suse
Ubuntu