Bug 1975949 (CVE-2021-3659)

Summary:	CVE-2021-3659 kernel: NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bdettelb, bhu, blc, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jeremy, jforbes, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, steved, tomckay, walters, wcosta, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Kernel 5.12	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 21:51:39 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:	1984560, 1984569, 1984570, 1984571, 1984572, 1984573, 1984574
Bug Blocks:	1973268

Description Alex 2021-06-24 19:33:42 UTC

The bug is inside net/mac802154/llsec.c (IEEE 802.15.4 support).
If fails allocating of the cipher handle for AEAD during initialization of LR-WPAN, then NULL pointer dereference could happen.

Reference:
https://syzkaller.appspot.com/bug?extid=12cf5fbfdeba210a89dd

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8

The previously used CVE for this one was CVE-2021-33033 (because this issue already incorrectly referenced  before from that older CVE).

Comment 1 Alex 2021-07-21 15:42:21 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1984560]

Comment 6 Justin M. Forbes 2021-07-26 16:38:47 UTC

This was fixed for Fedora with the 5.11.14 stable kernel updates.

Comment 11 errata-xmlrpc 2021-11-09 17:23:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4140 https://access.redhat.com/errata/RHSA-2021:4140

Comment 12 errata-xmlrpc 2021-11-09 18:27:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4356 https://access.redhat.com/errata/RHSA-2021:4356

Comment 13 Product Security DevOps Team 2021-11-09 21:51:34 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-2021-3659