Bug 1866254 (CVE-2011-0463)

Summary:	CVE-2011-0463 kernel: ocfs2_prepare_page_for_write function does not properly handle holes that cross page boundaries leads to information exposure
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, ptalbert, qzhao, rt-maint, rvrbovsk, steved, 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:	2020-08-05 19:27:54 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:	1866255
Bug Blocks:	1866256

Description Dhananjay Arunesh 2020-08-05 08:30:58 UTC

The ocfs2_prepare_page_for_write function in fs/ocfs2/aops.c in the Oracle Cluster File System 2 (OCFS2) subsystem in the Linux kernel does not properly handle holes that cross page boundaries, which allows local users to obtain potentially sensitive information from uninitialized disk locations by reading a file.

References:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=272b62c1f0f6f742046e45b50b6fec98860208a0
http://oss.oracle.com/pipermail/ocfs2-devel/2011-February/007846.html
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.39-rc1

Comment 1 Dhananjay Arunesh 2020-08-05 08:33:48 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1866255]

Comment 2 Alex 2020-08-05 13:14:30 UTC

"OCFS2 kernel module" disabled by default for all kernels of rhel*.

Comment 3 Justin M. Forbes 2020-08-05 16:08:42 UTC

This was fixed upstream almost 9 years ago, and has never impacted any currently supported version of Fedora.

Comment 4 Product Security DevOps Team 2020-08-05 19:27:54 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-2011-0463