Bug 2141752 (CVE-2022-43945)

Summary:	CVE-2022-43945 kernel: nfsd buffer overflow by RPC message over TCP with garbage data
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, brdeoliv, bskeggs, chwhite, crwood, ctoe, ddepaula, debarbos, dvlasenk, ezulian, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jpoimboe, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, kpatch-maint, lgoncalv, linville, lleshchi, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rhandlin, rvrbovsk, scweaver, smayhew, steved, tyberry, vkumar, walters, williams, xzhou, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A buffer overflow flaw was found in the Linux kernel nfsd (network file system) subsystem. The way a user sends RPC over TCP with excess data added at the end of the message could allow a remote user to starve the resources, causing a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-16 21:11:17 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:	2141768, 2141769, 2141770, 2141771, 2141772, 2141773, 2141774, 2142346, 2143172, 2143173, 2143174, 2143175, 2143184, 2143185, 2143186, 2143187, 2143188, 2167765
Bug Blocks:	2140235

Description Alex 2022-11-10 17:33:07 UTC

A flaw in the Linux Kernel nfsd (network file system) found. Remote user can send RPC over TCP with garbage data added at the end of the message. It can lead to NFSD send/receive buffer overflow on the server side, but without actual out of bounds memory access, so only deny of service possible.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f90497a16e434c2211c66e3de8e77b17868382b8

Comment 15 errata-xmlrpc 2022-12-13 16:06:00 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:8973 https://access.redhat.com/errata/RHSA-2022:8973

Comment 16 errata-xmlrpc 2022-12-13 16:06:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:8974 https://access.redhat.com/errata/RHSA-2022:8974

Comment 17 errata-xmlrpc 2022-12-15 16:24:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:9082 https://access.redhat.com/errata/RHSA-2022:9082

Comment 19 errata-xmlrpc 2023-01-23 15:17:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0300 https://access.redhat.com/errata/RHSA-2023:0300

Comment 20 errata-xmlrpc 2023-01-23 15:21:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0334 https://access.redhat.com/errata/RHSA-2023:0334

Comment 21 errata-xmlrpc 2023-01-23 15:23:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0348 https://access.redhat.com/errata/RHSA-2023:0348

Comment 22 Alex 2023-02-07 13:40:56 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2167765]

Comment 23 Justin M. Forbes 2023-02-09 22:06:22 UTC

This was fixed for Fedora with the 5.19.17 stable kernel updates.

Comment 24 errata-xmlrpc 2023-02-21 08:58:00 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0854 https://access.redhat.com/errata/RHSA-2023:0854

Comment 25 errata-xmlrpc 2023-02-21 09:21:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0832 https://access.redhat.com/errata/RHSA-2023:0832

Comment 26 errata-xmlrpc 2023-02-21 09:22:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0839 https://access.redhat.com/errata/RHSA-2023:0839

Comment 30 Product Security DevOps Team 2023-05-16 21:11:12 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-2022-43945