Bug 460859

Summary:	kernel: devmem: add range_is_allowed() check to mmap_mem() [rhel-4.8]
Product:	Red Hat Enterprise Linux 4	Reporter:	Eugene Teo (Security Response) <eteo>
Component:	kernel	Assignee:	Vitaly Mayatskikh <vmayatsk>
Status:	CLOSED ERRATA	QA Contact:	Martin Jenner <mjenner>
Severity:	high	Docs Contact:
Priority:	high
Version:	4.8	CC:	davej, dhoward, fluo, jan.iven, lwang, qcai, riek, security-response-team, tao, vgoyal, vmayatsk
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-05-18 19:26:21 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:	460857
Bug Blocks:	460862, 461297

Description Eugene Teo (Security Response) 2008-09-02 04:31:30 UTC

+++ This bug was initially created as a clone of Bug #460857 +++

Description of problem:
Eugene Teo discovered that range_is_allowed() check is only added in {read,write}_mem(). It is possible for an illegitimate application to bypass these checks, and access /dev/mem beyond the 1M limit by calling mmap_mem() instead.

--- Additional comment from eteo on 2008-09-02 00:07:32 EDT ---

This appears to be fixed in upstream since commit e2beb3eae.

Comment 3 RHEL Program Management 2008-09-02 18:43:31 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 4 RHEL Program Management 2008-09-03 12:51:11 UTC

Updating PM score.

Comment 5 Vivek Goyal 2008-09-30 21:16:26 UTC

Committed in 78.12.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/

Comment 7 Vivek Goyal 2008-11-20 20:31:27 UTC

This patch introduced a regression. Regression fix is now available from Vitaly. Putting the bug back to POST state so that regression fix can be committed.

Comment 8 Vivek Goyal 2008-11-25 13:42:56 UTC

Committed in 78.19.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/

Comment 14 errata-xmlrpc 2009-05-18 19:26:21 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2009-1024.html