Bug 1462153 (CVE-2017-1000370)

Summary:	CVE-2017-1000370 kernel: offset2lib patch protection bypass
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aquini, bhu, blc, dhoward, dominik.mierzejewski, fhrbata, gansalmon, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, 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:	The offset2lib patch as used in the i686 32-bit Linux kernel contains a vulnerability that allows a PIE binary to be execve()'ed with 1GB of arguments or environmental strings. the stack occupies the address 0x80000000 and the PIE binary is mapped above 0x40000000 nullifying the protection of the offset2lib patch.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:15:00 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:	1462828
Bug Blocks:	1473653

Description Andrej Nemec 2017-06-16 10:37:46 UTC

A flaw was found in the Linux kernel where execution of a PIE binary could allow for an attacker to corrupt memory or match priviledges of accessible setuid binaries on a system.

This is a different issue than  CVE-2017-1000371

Comment 1 Andrej Nemec 2017-06-16 10:37:57 UTC

Acknowledgments:

Name: Qualys Inc

Comment 2 Andrej Nemec 2017-06-16 10:38:45 UTC

External References:

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

Comment 3 Petr Matousek 2017-06-19 16:08:27 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1462828]

Comment 6 Wade Mealing 2017-09-14 08:09:05 UTC

Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat
Enterprise Linux 7 and MRG-2 as the i686 architecture is not supported by
this kernel.

This issue affects the Linux kernel packages as shipped with Red Hat
Enterprise Linux 5 and 6. At this time there is no plan to release an
update to fix this issue.