Bug 1488329 (CVE-2017-14140)

Summary:	CVE-2017-14140 kernel: Missing permission check in move_pages system call
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	airlied, ajax, aquini, bhu, blc, bskeggs, dhoward, eparis, esandeen, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nhorman, nmurray, plougher, quintela, rt-maint, rvrbovsk, slawomir, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.13	Doc Type:	If docs needed, set a value
Doc Text:	The move_pages system call in mm/migrate.c in the Linux kernel doesn't check the effective uid of the target process. This enables a local attacker to learn the memory layout of a setuid executable allowing mitigation of ASLR.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:24:01 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:	1488330, 1499610, 1499611, 1499612, 1499613, 1499614
Bug Blocks:	1488331

Description Adam Mariš 2017-09-05 07:45:23 UTC

The move_pages system call in mm/migrate.c in the Linux kernel before
4.12.9 doesn't check the effective uid of the target process, enabling
a local attacker to learn the memory layout of a setuid executable
despite ASLR.

Upstream patch:

https://github.com/torvalds/linux/commit/197e7e521384a23b9e585178f3f11c9fa08274b9

Comment 1 Adam Mariš 2017-09-05 07:46:29 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1488330]

Comment 2 Justin M. Forbes 2017-09-05 14:02:39 UTC

This was fixed in 4.12.9 stable which is currently available across all supported Fedora releases.

Comment 4 Wade Mealing 2017-10-09 05:36:40 UTC

Statement:
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6,7 and MRG-2.

Red Hat Enterprise Linux 5 and 6 are in the Production 3 Phase. During the
Production 3 Phase, Critical impact Security Advisories (RHSAs) and
selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as
they become available.

The official life cycle policy can be reviewed here:

https://access.redhat.com/support/policy/updates/errata/


This issue does not meet the inclusion criteria for the Production 3 Phase
and will be marked as CLOSED/WONTFIX. If this remains a critical
requirement, please contact Red Hat Customer Support to request
a re-evaluation of the issue, citing a clear business justification. Note
that a strong business justification will be required for re-evaluation.
Red Hat Customer Support can be contacted via the Red Hat Customer Portal.
  
Future Linux kernel updates for Red Hat Enterprise Linux 7 may address this issue.

Comment 8 errata-xmlrpc 2018-04-10 08:05:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:0676

Comment 9 errata-xmlrpc 2018-04-10 09:29:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2018:1062