Bug 1462165 (CVE-2017-1000379)

Summary:	CVE-2017-1000379 kernel: Incorrectly mapped contents of PIE executable
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
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, blc, carnil, dhoward, esammons, fhrbata, gansalmon, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, mlangsdo, nmurray, pholasek, plougher, pmatouse, rt-maint, rvrbovsk, security-response-team, slawomir, vdronov, williams, wmealing
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:	2017-10-05 21:32:42 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:	1462833
Bug Blocks:	1473657

Description Andrej Nemec 2017-06-16 10:53:43 UTC

The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack.

Comment 1 Andrej Nemec 2017-06-16 10:53:54 UTC

Acknowledgments:

Name: Qualys Inc

Comment 2 Andrej Nemec 2017-06-16 10:54:37 UTC

External References:

https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

Upstream patchset:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1be7107fbe18eed3e319a6c3e83c78254b693acb

Comment 3 Petr Matousek 2017-06-19 16:09:06 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1462833]

Comment 4 Wade Mealing 2017-08-29 08:17:17 UTC

Statement:

This issue was part of the stack guard fixes that was fixed along side the CVE-2017-1000364 flaw.  This issue has previously affected Red Hat Enterprise Linux 5,6,7 and MRG-2.  This issue is currently fixed in most versions of shipping products.