Bug 1108744 (CVE-2014-4027)

Summary:	CVE-2014-4027 Kernel: target/rd: imformation leakage
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, bhu, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, nobody, npajkovs, pholasek, plougher, rt-maint, rvrbovsk, williams
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	An information leak flaw was found in the RAM Disks Memory Copy (rd_mcp) backend driver of the iSCSI Target subsystem of the Linux kernel. A privileged user could use this flaw to leak the contents of kernel memory to an iSCSI initiator remote client.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-02-10 07:23:41 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:	1108751, 1108752, 1108754, 1108755, 1108756
Bug Blocks:	1107940

Description Prasad Pandit 2014-06-12 13:58:01 UTC

Linux kernel built with the Generic Target Core Mod(TCM), an iSCSI Target
engine(CONFIG_TARGET_CORE), along with the Ramdisk back-end driver support, is vulnerable to an information leakage flaw. It could occur while performing I/O operations on behalf of a SCSI initiator.

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

Upstream fix:
-------------
  -> https://git.kernel.org/linus/4442dc8a92b8f9ad8ee9e7f8438f4c04c03a22dc
v2-> http://permalink.gmane.org/gmane.linux.scsi.target.devel/6618

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2014/06/11/1

Comment 1 Prasad Pandit 2014-06-12 14:00:35 UTC

Statement:

This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5.

This issue affects the versions of Linux kernel package as shipped with Red Hat Enterprise Linux 6 and 7. Future kernel updates for Red Hat Enterprise Linux 6 and 7 may address this issue.

Comment 4 errata-xmlrpc 2014-07-22 18:04:48 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0913 https://rhn.redhat.com/errata/RHSA-2014-0913.html

Comment 5 Martin Prpič 2014-12-03 09:56:50 UTC

IssueDescription:

An information leak flaw was found in the RAM Disks Memory Copy (rd_mcp) backend driver of the iSCSI Target subsystem of the Linux kernel. A privileged user could use this flaw to leak the contents of kernel memory to an iSCSI initiator remote client.

Comment 6 errata-xmlrpc 2014-12-09 20:33:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1971 https://rhn.redhat.com/errata/RHSA-2014-1971.html