Bug 1858038 (CVE-2019-14560)

Summary:	CVE-2019-14560 edk2: Function GetEfiGlobalVariable2() return value not checked in DxeImageVerificationHandler()
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	berrange, crobinso, kraxel, pbonzini, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1858039, 1858040, 1861743, 1861744, 1910520
Bug Blocks:	1858041

Description Pedro Sampaio 2020-07-16 20:59:41 UTC

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:

https://bugzilla.tianocore.org/show_bug.cgi?id=2167

Comment 1 Pedro Sampaio 2020-07-16 21:00:11 UTC

Created edk2 tracking bugs for this issue:

Affects: epel-all [bug 1858039]
Affects: fedora-all [bug 1858040]

Comment 4 Riccardo Schirone 2020-07-29 12:52:06 UTC

Proposed patch:
https://bugzilla.tianocore.org/attachment.cgi?id=405&action=diff

Comment 6 Riccardo Schirone 2020-07-29 13:12:56 UTC

In function DxeImageVerificationHandler() there is a call to GetEfiGlobalVariable2 (EFI_SECURE_BOOT_MODE_NAME, ...) but the return value is not checked. If an attacker is able to cause the API to fail it would allow him to bypass secure boot.

Comment 11 errata-xmlrpc 2023-11-07 08:12:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6330 https://access.redhat.com/errata/RHSA-2023:6330

Comment 12 errata-xmlrpc 2023-11-14 15:16:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:6919 https://access.redhat.com/errata/RHSA-2023:6919

Comment 14 errata-xmlrpc 2024-01-24 16:41:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0408 https://access.redhat.com/errata/RHSA-2024:0408

Comment 16 errata-xmlrpc 2024-03-19 17:30:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:1415 https://access.redhat.com/errata/RHSA-2024:1415