Bug 1473214 (CVE-2017-11472)

Summary:	CVE-2017-11472 kernel: ACPI operand cache leak in acpi_ns_terminate()
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, bhu, blc, 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, rt-maint, rvrbovsk, vdronov, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.12	Doc Type:	If docs needed, set a value
Doc Text:	The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 does not flush the operand cache and causes a kernel stack dump. A local users could obtain sensitive information from kernel memory and bypass the KASLR protection mechanism (in the kernel through 4.9) via a crafted ACPI table.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-07-24 09:55:41 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:	1473215, 1474278
Bug Blocks:	1473216

Description Adam Mariš 2017-07-20 08:58:24 UTC

The acpi_ns_terminate() function in drivers/acpi/acpica/nsutils.c in the Linux kernel before 4.12 does not flush the operand cache and causes a kernel stack dump, which allows local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism (in the kernel through 4.9) via a crafted ACPI table.

References:

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-11472

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11472

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b2d69114fefa474fca542e51119036dceb4aa6f

Comment 1 Adam Mariš 2017-07-20 08:59:15 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1473215]

Comment 5 Vladis Dronov 2017-07-24 09:55:41 UTC

Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2 as the code with the flaw is not present in the products listed.

Comment 6 Justin M. Forbes 2018-01-29 16:26:06 UTC

This was fixed for Fedora with the 4.12 rebases.