Bug 2090857 (CVE-2022-28735)

Summary: CVE-2022-28735 grub2: shim_lock verifier allows non-kernel files to be loaded
Product: [Other] Security Response Reporter: Marco Benatto <mbenatto>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bootloader-eng-team, jaredz, mlewando, pjanda, pjones, pkotvan, rharwood, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: grub 2.12 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in grub2. The shim_lock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed.
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-06-16 22:07:11 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2090858, 2090859, 2090860, 2090861, 2090862, 2090863, 2090864    
Bug Blocks: 1991681    

Description Marco Benatto 2022-05-26 17:52:48 UTC
The grub2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in grub breaking the secure boot trust-chain.

Comment 2 errata-xmlrpc 2022-06-16 13:51:22 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2022:5098 https://access.redhat.com/errata/RHSA-2022:5098

Comment 3 errata-xmlrpc 2022-06-16 14:55:40 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:5096 https://access.redhat.com/errata/RHSA-2022:5096

Comment 4 errata-xmlrpc 2022-06-16 15:24:02 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:5099 https://access.redhat.com/errata/RHSA-2022:5099

Comment 5 errata-xmlrpc 2022-06-16 15:34:03 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:5095 https://access.redhat.com/errata/RHSA-2022:5095

Comment 6 errata-xmlrpc 2022-06-16 15:46:12 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2022:5100 https://access.redhat.com/errata/RHSA-2022:5100

Comment 7 Product Security DevOps Team 2022-06-16 22:07:09 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-28735