Bug 1974823 (CVE-2021-0605)

Summary:	CVE-2021-0605 kernel: In pfkey_dump() dplen and splen can both be specified to access the xfrm_address_t structure out of bounds
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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:	Linux kernel v 5.8	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the way the Linux kernel's pfkey_dump function trusted the provided filter size parameters. A local, sufficiently privileged user could use this flaw to leak information from the kernel.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-12-15 11:24:17 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:	1891595, 1974825, 1981458, 1981459, 1982265, 1982266, 1982267
Bug Blocks:	1974826

Description Pedro Sampaio 2021-06-22 15:44:23 UTC

In pfkey_dump() dplen and splen can both be specified to access the
xfrm_address_t structure out of bounds in__xfrm_state_filter_match()
when it calls addr_match() with the indexes.  Return EINVAL if either
are out of range.

References:

https://source.android.com/security/bulletin/pixel/2021-06-01
https://android.googlesource.com/kernel/common/+/b59a23d596807a5aa88d8dd5655a66c6843729b3

Comment 1 Pedro Sampaio 2021-06-22 15:49:20 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1974825]

Comment 2 Justin M. Forbes 2021-06-29 15:58:19 UTC

This was fixed for Fedora with the 5.8.x stable rebases.