Bug 1067341

Summary:	Kernel: nfs: information leakage flaw
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, anton, aquini, bhu, davej, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jrusnack, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mcressma, nfs-maint, npajkovs, pholasek, plougher, rt-maint, rvrbovsk, rwheeler, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-02-20 20:38:23 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:

Description Prasad Pandit 2014-02-20 09:27:52 UTC

Linux kernel build with the NFS file system(CONFIG_NFS_FS) along with the
support for NFSv4 protocol(CONFIG_NFS_V4) is vulnerable to an information
leakage flaw. It could occur while writing to a file wherein NFS server has
offered write delegation to the client. Such delegation allows NFS client to
perform the said operation locally without instant interaction with the server.

A user/program could use this flaw to leak kernel memory bytes.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/263b4509ec4d47e0da3e753f85a39ea12d1eff24

Comment 1 Prasad Pandit 2014-02-20 09:37:03 UTC

Statement:

This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.

This issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 6. Future kernel updates for Red Hat Enterprise Linux 6  may address this issue.

Comment 2 Prasad Pandit 2014-02-20 20:38:23 UTC


*** This bug has been marked as a duplicate of bug 1066939 ***