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CVE-2019-20908
Published: Jul 15, 2020
Modified: Aug 5, 2024
PUBLISHED
Description
An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.
| Vendor | Product | Versions |
|---|---|---|
n/a | n/a | affected n/a |
References
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
x_refsource_MISC
[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules
mailing-list
x_refsource_MLIST
USN-4427-1
vendor-advisory
x_refsource_UBUNTU
[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities
mailing-list
x_refsource_MLIST
[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar
mailing-list
x_refsource_MLIST
[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar
mailing-list
x_refsource_MLIST
USN-4439-1
vendor-advisory
x_refsource_UBUNTU
USN-4426-1
vendor-advisory
x_refsource_UBUNTU
USN-4440-1
vendor-advisory
x_refsource_UBUNTU
openSUSE-SU-2020:1153
vendor-advisory
x_refsource_SUSE
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