Bug 2213455 (CVE-2023-21102)

Summary:	CVE-2023-21102 kernel: bypass of shadow stack protection due to a logic error
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, ccheney, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, ldoskova, lgoncalv, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, scweaver, vkumar, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Kernel 6.2-rc1	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the __efi_rt_asm_wrapper of the efi-rt-wrapper.S in the Linux kernel, where there is a possible bypass of shadow stack protection due to a logic error in the code. This flaw could lead to local escalation of privilege without additional execution privileges needed.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2213498, 2213499, 2213500, 2213501, 2213502, 2213503, 2213504, 2213505, 2213506, 2213507, 2213508, 2213509, 2213510, 2213511, 2213512, 2214493
Bug Blocks:	2208266

Description Rohit Keshri 2023-06-08 08:01:11 UTC

In __efi_rt_asm_wrapper of efi-rt-wrapper.S, there is a possible bypass of shadow stack protection due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed.

Reference:
https://android.googlesource.com/kernel/common/+/ec6fe823507b2f6ef4a58f3a9bee9a5ec086c32c%5E%21/
https://source.android.com/docs/security/bulletin/2023-05-01

Comment 8 errata-xmlrpc 2023-09-12 09:50:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:5091 https://access.redhat.com/errata/RHSA-2023:5091

Comment 9 errata-xmlrpc 2023-09-12 10:14:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:5069 https://access.redhat.com/errata/RHSA-2023:5069