Bug 2090899 (CVE-2022-28737)

Summary:	CVE-2022-28737 shim: Buffer overflow when loading crafted EFI images
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bootloader-eng-team, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	shim 15.6	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in shim during the handling of EFI executables. A crafted EFI image can lead to an overflow in shim. This flaw allows an attacker to perform an out-of-bounds write in memory. A successful attack can lead to data integrity, confidentiality issues, and arbitrary code execution.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-06-16 22:08:00 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:	2091090, 2091091, 2091092, 2091093, 2091094, 2091095, 2091096, 2091097, 2091098, 2091099, 2091100, 2091101
Bug Blocks:	2090898

Description Marco Benatto 2022-05-26 20:50:34 UTC

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables. The handle_image() function takes in account by the SizeOfRawData field from each section to be load, an attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

Comment 2 errata-xmlrpc 2022-06-16 13:51:28 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 14:55:50 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 15:34:13 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 15:46:14 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 22:07:58 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-2022-28737