Bug 1646768 (CVE-2018-12207)

Summary:	CVE-2018-12207 hw: Machine Check Error on Page Size Change (IFU)
Product:	[Other] Security Response	Reporter:	Wade Mealing <wmealing>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acaringi, airlied, asavkov, bhu, blc, bmontgom, brdeoliv, bskeggs, chayang, dblechte, dfediuck, dhoward, dvlasenk, eedri, emcnabb, eparis, esammons, eshatokhin, fhrbata, gsuckevi, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jbastian, jburrell, jeremy, jforbes, jglisse, jlelli, jmario, joe.lawrence, john.j5live, jokerman, jonathan, josef, jpoimboe, jross, jshortt, jstancek, jthierry, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lilu, linville, longman, masami256, matt, mcascell, mchehab, mcressma, mgoldboi, michal.skrivanek, mjenner, mjg59, mlangsdo, mvanderw, nmurray, nstielau, osoukup, pbonzini, plougher, pmatouse, pmyers, ppandit, qzhao, rhandlin, rt-maint, rvrbovsk, sbonazzo, security-response-team, sherold, skontar, sponnaga, steved, vkuznets, williams, wmealing, ycote, ykopkova, yozone, yturgema, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the way Intel CPUs handle inconsistency between, virtual to physical memory address translations in CPU's local cache and system software's Paging structure entries. A privileged guest user may use this flaw to induce a hardware Machine Check Error on the host processor, resulting in a severe DoS scenario by halting the processor. System software like OS OR Virtual Machine Monitor (VMM) use virtual memory system for storing program instructions and data in memory. Virtual Memory system uses Paging structures like Page Tables and Page Directories to manage system memory. The processor's Memory Management Unit (MMU) uses Paging structure entries to translate program's virtual memory addresses to physical memory addresses. The processor stores these address translations into its local cache buffer called - Translation Lookaside Buffer (TLB). TLB has two parts, one for instructions and other for data addresses. System software can modify its Paging structure entries to change address mappings OR certain attributes like page size etc. Upon such Paging structure alterations in memory, system software must invalidate the corresponding address translations in the processor's TLB cache. But before this TLB invalidation takes place, a privileged guest user may trigger an instruction fetch operation, which could use an already cached, but now invalid, virtual to physical address translation from Instruction TLB (ITLB). Thus accessing an invalid physical memory address and resulting in halting the processor due to the Machine Check Error (MCE) on Page Size Change.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-11-13 00:51:11 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:	1690334, 1690343, 1690344, 1690345, 1690346, 1690347, 1692385, 1692596, 1698408, 1698409, 1698410, 1698411, 1698412, 1698413, 1698414, 1698415, 1698416, 1698417, 1707269, 1733009, 1733010, 1762993, 1766964, 1766965, 1766977, 1766978, 1766987, 1768306, 1768307, 1768308, 1768309, 1771645, 1779250
Bug Blocks:	1709291, 1750329, 1750330, 1750331, 1750332, 1750333, 1750334, 1752312

Description Wade Mealing 2018-11-06 01:21:12 UTC

A flaw was found in computer hardware of the Intel microprocessors related to the instruction-side TLB (Translation Lookaside Buffer) that caches translations from guest (and host) virtual addresses into physical addresses.  

This is a software fix that attempts to prevent exploitation of the hardware through preventing a hacker from creating an exploitable condition



Additional information:

https://access.redhat.com/security/vulnerabilities/ifu-page-mce

Comment 11 Wade Mealing 2019-05-06 10:36:42 UTC

Statement:

Red Hat Product Security is aware of this issue. Updates will be released as they become available. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/ifu-page-mce

Comment 31 Prasad Pandit 2019-11-12 18:07:45 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1771645]

Comment 32 Petr Matousek 2019-11-12 18:12:00 UTC

External References:

https://access.redhat.com/security/vulnerabilities/ifu-page-mce
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00210.html

Comment 33 errata-xmlrpc 2019-11-12 19:08:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3833 https://access.redhat.com/errata/RHSA-2019:3833

Comment 34 errata-xmlrpc 2019-11-12 19:25:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:3835 https://access.redhat.com/errata/RHSA-2019:3835

Comment 35 errata-xmlrpc 2019-11-12 19:53:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3832 https://access.redhat.com/errata/RHSA-2019:3832

Comment 36 errata-xmlrpc 2019-11-12 20:10:39 UTC

This issue has been addressed in the following products:

  Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS
  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7

Via RHSA-2019:3860 https://access.redhat.com/errata/RHSA-2019:3860

Comment 37 errata-xmlrpc 2019-11-12 20:44:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2019:3837 https://access.redhat.com/errata/RHSA-2019:3837

Comment 38 errata-xmlrpc 2019-11-12 20:45:43 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.5 Extended Update Support

Via RHSA-2019:3838 https://access.redhat.com/errata/RHSA-2019:3838

Comment 39 errata-xmlrpc 2019-11-12 20:46:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:3834 https://access.redhat.com/errata/RHSA-2019:3834

Comment 40 errata-xmlrpc 2019-11-12 20:57:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2019:3836 https://access.redhat.com/errata/RHSA-2019:3836

Comment 41 errata-xmlrpc 2019-11-12 20:58:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.2 Telco Extended Update Support
  Red Hat Enterprise Linux 7.2 Advanced Update Support
  Red Hat Enterprise Linux 7.2 Update Services for SAP Solutions

Via RHSA-2019:3841 https://access.redhat.com/errata/RHSA-2019:3841

Comment 42 errata-xmlrpc 2019-11-12 21:07:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2019:3844 https://access.redhat.com/errata/RHSA-2019:3844

Comment 43 errata-xmlrpc 2019-11-12 21:09:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.6 Advanced Update Support

Via RHSA-2019:3842 https://access.redhat.com/errata/RHSA-2019:3842

Comment 44 errata-xmlrpc 2019-11-12 21:10:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 Advanced Update Support

Via RHSA-2019:3843 https://access.redhat.com/errata/RHSA-2019:3843

Comment 45 errata-xmlrpc 2019-11-12 21:19:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Telco Extended Update Support
  Red Hat Enterprise Linux 7.3 Advanced Update Support
  Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions

Via RHSA-2019:3840 https://access.redhat.com/errata/RHSA-2019:3840

Comment 46 errata-xmlrpc 2019-11-12 21:33:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2019:3839 https://access.redhat.com/errata/RHSA-2019:3839

Comment 47 Product Security DevOps Team 2019-11-13 00:51:11 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-12207

Comment 48 Wade Mealing 2019-11-13 01:55:07 UTC

Mitigation:

For mitigation related information, please refer to the Red Hat vulnerability article: https://access.redhat.com/security/vulnerabilities/ifu-page-mce .

Comment 50 errata-xmlrpc 2019-11-19 15:56:35 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.2

Via RHSA-2019:3916 https://access.redhat.com/errata/RHSA-2019:3916

Comment 54 errata-xmlrpc 2019-11-20 20:50:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3936 https://access.redhat.com/errata/RHSA-2019:3936

Comment 55 errata-xmlrpc 2019-11-21 09:55:30 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.1

Via RHSA-2019:3941 https://access.redhat.com/errata/RHSA-2019:3941

Comment 71 errata-xmlrpc 2020-01-06 14:12:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2020:0026 https://access.redhat.com/errata/RHSA-2020:0026

Comment 72 errata-xmlrpc 2020-01-06 14:40:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:0028 https://access.redhat.com/errata/RHSA-2020:0028

Comment 73 errata-xmlrpc 2020-01-22 21:26:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:0204 https://access.redhat.com/errata/RHSA-2020:0204