REDHAT-BUG-1858038
First published: Thu Jul 16 2020(Updated: )
A flaw was found in edk2. Function GetEfiGlobalVariable2() return value is not checked possibly leading to secure boot bypass if an attacker can cause the API to fail. References: <a href="https://bugzilla.tianocore.org/show_bug.cgi?id=2167">https://bugzilla.tianocore.org/show_bug.cgi?id=2167</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Tianocore EDK II |
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Reference Links
- https://bugzilla.tianocore.org/show_bug.cgi?id=2167
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1858039
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1858040
- https://bugzilla.tianocore.org/attachment.cgi?id=405&action=diff
- https://access.redhat.com/errata/RHSA-2023:6330
- https://access.redhat.com/errata/RHSA-2023:6919
- https://access.redhat.com/errata/RHSA-2024:0408
- https://access.redhat.com/errata/RHSA-2024:1415
- https://bugzilla.redhat.com/show_bug.cgi?id=1858038
Frequently Asked Questions
What is the severity of REDHAT-BUG-1858038?
The severity of REDHAT-BUG-1858038 is high due to the potential for secure boot bypass.
How do I fix REDHAT-BUG-1858038?
To fix REDHAT-BUG-1858038, ensure that the return values from the GetEfiGlobalVariable2() function are properly checked in the code.
Who is affected by REDHAT-BUG-1858038?
Users of the TianoCore edk2 firmware are affected by REDHAT-BUG-1858038.
What could an attacker achieve by exploiting REDHAT-BUG-1858038?
An attacker could exploit REDHAT-BUG-1858038 to bypass secure boot mechanisms.
Is there a workaround for REDHAT-BUG-1858038?
Currently, there are no documented workarounds for REDHAT-BUG-1858038, and it is advisable to apply patches as they become available.
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