CVE-2019-20908
- State
- Published
- Severity
- Not scored
- Published
- Jul 15, 2020
- Updated
- Aug 5, 2024
- Reserved
- Jul 15, 2020
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.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
- [oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modulesmailing-list
- USN-4427-1vendor-advisory
- [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilitiesmailing-list
- [oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radarmailing-list
- [oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radarmailing-list
- USN-4439-1vendor-advisory
- USN-4426-1vendor-advisory
- USN-4440-1vendor-advisory
- openSUSE-SU-2020:1153vendor-advisory
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