Bug 1857859 - kernel: incorrect access permissions for the efivar_ssdt ACPI variable can be used to bypass lockdown or secure boot restrictions
Summary: kernel: incorrect access permissions for the efivar_ssdt ACPI variable can be...
Keywords:
Status: CLOSED DUPLICATE of bug 1852942
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1852944 1857860
Blocks: 1857863
TreeView+ depends on / blocked
 
Reported: 2020-07-16 16:56 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-07-17 12:43 UTC (History)
47 users (show)

Fixed In Version:
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Last Closed: 2020-07-17 12:40:28 UTC
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Description Guilherme de Almeida Suckevicz 2020-07-16 16:56:21 UTC
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.

Reference and upstream commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e

Comment 1 Guilherme de Almeida Suckevicz 2020-07-16 16:57:30 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1857860]

Comment 2 Justin M. Forbes 2020-07-16 19:16:40 UTC
Is this not a duplicate of 1852942?

Comment 3 Guilherme de Almeida Suckevicz 2020-07-17 12:40:28 UTC

*** This bug has been marked as a duplicate of bug 1852942 ***


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