Bug 1451386 (CVE-2017-9059)

Summary:	CVE-2017-9059 kernel: Module reference leak due to improper shut down of callback channel on umount
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, bhu, dhoward, fhrbata, gansalmon, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, 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:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:12:45 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:	1451996
Bug Blocks:

Description Adam Mariš 2017-05-16 14:30:11 UTC

A leakage of module reference and kernel daemon in NFSv4 when NFSv4 mounts are made and then all outstanding NFSv4 mounts are removed. Local attackers with permission to mount NFS filesystems can potentially cause DoS by running the system out of resources.

Fixed by following patches:

https://www.spinics.net/lists/linux-nfs/msg63334.html

which were merged into mainline in following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c70422f760c120480fee4de6c38804c72aa26bc1

Comment 1 Adam Mariš 2017-05-18 06:33:11 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1451996]