Bug 2133490 (CVE-2022-3435)

Summary:	CVE-2022-3435 kernel: out-of-bounds read in fib_nh_match of the file net/ipv4/fib_semantics.c
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
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, bhoppus, bhu, brdeoliv, bskeggs, chwhite, crwood, ddepaula, debarbos, dvlasenk, ezulian, gnault, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds memory read flaw was found in the Linux kernel. The IPv4 Handler component may delete IPv4 routes containing a multipath spec while the fib_info is using a nexthop object. This issue allows a local attacker access to unauthorized data.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-09 16:56:28 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:	2133491, 2134815, 2137369, 2137370, 2137371, 2137372
Bug Blocks:	2133492

Description Marian Rehak 2022-10-10 15:31:48 UTC

This affects the function fib_nh_match of the file net/ipv4/fib_semantics.c of the component IPv4 Handler. The manipulation leads to out-of-bounds read. It is possible to initiate the attack remotely.

Reference:

https://vuldb.com/?id.210357
https://lore.kernel.org/netdev/20221005181257.8897-1-dsahern@kernel.org/T/#u

Comment 1 Marian Rehak 2022-10-10 15:32:15 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2133491]

Comment 11 errata-xmlrpc 2023-05-09 07:11:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2148 https://access.redhat.com/errata/RHSA-2023:2148

Comment 12 errata-xmlrpc 2023-05-09 07:50:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2458 https://access.redhat.com/errata/RHSA-2023:2458

Comment 13 Product Security DevOps Team 2023-05-09 16:56:23 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-2022-3435