Bug 1519781 (CVE-2017-5754, Meltdown) - CVE-2017-5754 hw: cpu: speculative execution permission faults handling
Summary: CVE-2017-5754 hw: cpu: speculative execution permission faults handling
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-5754, Meltdown
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Engineering1519799 Engineering1519800 Engineering1519801 Engineering1519802 Engineering1526964 Engineering1526965 Engineering1526966 Engineering1526967 Engineering1526968 Engineering1526969 Engineering1526970 Engineering1527476 Engineering1527477 Engineering1527478 Engineering1527479 Engineering1527480 Engineering1527481 Engineering1527482 Engineering1527483 Engineering1527484 1530826 Red Hat1531357 Red Hat1531562 Engineering1531720 Engineering1532049 Engineering1532050 Engineering1532074 Engineering1532077 Engineering1532292 Red Hat1537521 Engineering1538543 Engineering1550420 Engineering1550421 Engineering1550599 Engineering1550606 Engineering1553283 Engineering1553285 Engineering1553287 Engineering1553289 Engineering1553290 Partner1559948
Blocks: Embargoed1516900 Engineering1789852
TreeView+ depends on / blocked
 
Reported: 2017-12-01 13:01 UTC by Petr Matousek
Modified: 2022-03-13 14:34 UTC (History)
71 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5754 relies on the fact that, on impacted microprocessors, during speculative execution of instruction permission faults, exception generation triggered by a faulting access is suppressed until the retirement of the whole instruction block. In a combination with the fact that memory accesses may populate the cache even when the block is being dropped and never committed (executed), an unprivileged local attacker could use this flaw to read privileged (kernel space) memory by conducting targeted cache side-channel attacks. Note: CVE-2017-5754 affects Intel x86-64 microprocessors. AMD x86-64 microprocessors are not affected by this issue.
Clone Of: CVE-2017-5715
Environment:
Last Closed: 2018-05-28 13:59:15 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0007 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 05:38:27 UTC
Red Hat Product Errata RHSA-2018:0008 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 05:41:22 UTC
Red Hat Product Errata RHSA-2018:0009 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 05:03:36 UTC
Red Hat Product Errata RHSA-2018:0010 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 04:16:37 UTC
Red Hat Product Errata RHSA-2018:0011 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 05:17:48 UTC
Red Hat Product Errata RHSA-2018:0016 0 normal SHIPPED_LIVE Important: kernel-rt security update 2018-01-04 10:49:20 UTC
Red Hat Product Errata RHSA-2018:0017 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 10:49:35 UTC
Red Hat Product Errata RHSA-2018:0018 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 18:06:10 UTC
Red Hat Product Errata RHSA-2018:0020 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 20:26:01 UTC
Red Hat Product Errata RHSA-2018:0021 0 normal SHIPPED_LIVE Important: kernel-rt security update 2018-01-04 21:50:09 UTC
Red Hat Product Errata RHSA-2018:0022 0 normal SHIPPED_LIVE Important: kernel security update 2018-01-04 22:04:18 UTC
Red Hat Product Errata RHSA-2018:0044 0 normal SHIPPED_LIVE Important: redhat-virtualization-host security update 2018-01-05 20:51:31 UTC
Red Hat Product Errata RHSA-2018:0045 0 normal SHIPPED_LIVE Important: rhvm-appliance security update 2018-01-05 21:00:25 UTC
Red Hat Product Errata RHSA-2018:0046 0 normal SHIPPED_LIVE Important: rhev-hypervisor7 security update 2018-01-05 20:47:08 UTC
Red Hat Product Errata RHSA-2018:0047 0 normal SHIPPED_LIVE Important: redhat-virtualization-host security update 2018-01-05 20:47:34 UTC
Red Hat Product Errata RHSA-2018:0089 0 normal SHIPPED_LIVE Important: Red Hat CloudForms 4.1 security update 2018-01-16 02:34:27 UTC
Red Hat Product Errata RHSA-2018:0090 0 normal SHIPPED_LIVE Important: Red Hat CloudForms 4.2 security update 2018-01-16 02:35:02 UTC
Red Hat Product Errata RHSA-2018:0091 0 normal SHIPPED_LIVE Important: Red Hat CloudForms 4.5 security update 2018-01-16 02:35:36 UTC
Red Hat Product Errata RHSA-2018:0092 0 normal SHIPPED_LIVE Important: Red Hat CloudForms 4.0 security update 2018-01-17 01:58:35 UTC
Red Hat Product Errata RHSA-2018:0151 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-01-25 16:17:48 UTC
Red Hat Product Errata RHSA-2018:0182 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-01-25 16:59:45 UTC
Red Hat Product Errata RHSA-2018:0292 0 normal SHIPPED_LIVE Important: kernel security update 2018-02-09 17:57:26 UTC
Red Hat Product Errata RHSA-2018:0464 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-03-07 20:23:36 UTC
Red Hat Product Errata RHSA-2018:0496 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-03-13 19:12:18 UTC
Red Hat Product Errata RHSA-2018:0502 0 normal SHIPPED_LIVE Important: kernel-alt security and bug fix update 2018-03-13 19:39:22 UTC
Red Hat Product Errata RHSA-2018:0512 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2018-03-13 22:38:36 UTC
Red Hat Product Errata RHSA-2018:0654 0 None None None 2018-04-10 05:10:02 UTC
Red Hat Product Errata RHSA-2018:1062 0 None None None 2018-04-10 09:35:29 UTC
Red Hat Product Errata RHSA-2018:1129 0 None None None 2018-04-17 15:34:08 UTC
Red Hat Product Errata RHSA-2018:1319 0 None None None 2018-05-08 19:00:02 UTC
Red Hat Product Errata RHSA-2018:1346 0 None None None 2018-05-08 20:55:56 UTC
Red Hat Product Errata RHSA-2018:1349 0 None None None 2018-05-08 21:48:39 UTC
Red Hat Product Errata RHSA-2018:1350 0 None None None 2018-05-08 21:51:56 UTC
Red Hat Product Errata RHSA-2018:1351 0 None None None 2018-05-08 21:51:05 UTC
Red Hat Product Errata RHSA-2019:1046 0 None None None 2019-05-08 12:31:40 UTC

Description Petr Matousek 2017-12-01 13:01:16 UTC 
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited.

Variant CVE-2017-5754 relies on the fact that, on impacted microprocessors, during speculative execution of instruction permission faults, exception generation triggered by a faulting access is suppressed until the retirement of the whole instruction block. In a combination with the fact that memory accesses may populate the cache even when the block is being dropped and never committed (executed), an unprivileged local attacker could use this flaw to read privileged (kernel space) memory by conducting targeted cache side-channel attacks.

Note: CVE-2017-5754 affects Intel x86-64 microprocessors. AMD x86-64 microprocessors are not affected by this issue.
Comment 4 Petr Matousek 2018-01-03 19:35:33 UTC 
Acknowledgments:

Name: Google Project Zero
Comment 7 Petr Matousek 2018-01-03 22:54:43 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1530826]
Comment 9 errata-xmlrpc 2018-01-03 23:18:45 UTC 
This issue has been addressed in the following products:

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

Via RHSA-2018:0010 https://access.redhat.com/errata/RHSA-2018:0010
Comment 10 errata-xmlrpc 2018-01-04 00:05:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Extended Update Support

Via RHSA-2018:0009 https://access.redhat.com/errata/RHSA-2018:0009
Comment 11 errata-xmlrpc 2018-01-04 00:19:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.7 Extended Update Support

Via RHSA-2018:0011 https://access.redhat.com/errata/RHSA-2018:0011
Comment 12 errata-xmlrpc 2018-01-04 00:43:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0007 https://access.redhat.com/errata/RHSA-2018:0007
Comment 13 errata-xmlrpc 2018-01-04 00:46:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:0008 https://access.redhat.com/errata/RHSA-2018:0008
Comment 14 errata-xmlrpc 2018-01-04 05:51:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0016 https://access.redhat.com/errata/RHSA-2018:0016
Comment 15 errata-xmlrpc 2018-01-04 05:53:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.6 Advanced Update Support
  Red Hat Enterprise Linux 6.6 Telco Extended Update Support

Via RHSA-2018:0017 https://access.redhat.com/errata/RHSA-2018:0017
Comment 16 errata-xmlrpc 2018-01-04 13:08:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.4 Advanced Update Support

Via RHSA-2018:0018 https://access.redhat.com/errata/RHSA-2018:0018
Comment 17 errata-xmlrpc 2018-01-04 16:55:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.2 Advanced Update Support

Via RHSA-2018:0020 https://access.redhat.com/errata/RHSA-2018:0020
Comment 18 errata-xmlrpc 2018-01-04 16:57:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2018:0021 https://access.redhat.com/errata/RHSA-2018:0021
Comment 19 errata-xmlrpc 2018-01-04 17:08:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 Advanced Update Support

Via RHSA-2018:0022 https://access.redhat.com/errata/RHSA-2018:0022
Comment 20 Justin M. Forbes 2018-01-04 18:11:34 UTC 
This issue is fixed for Fedora with the kernel-4.14.11 stable updates.
Comment 24 errata-xmlrpc 2018-01-05 15:52:06 UTC 
This issue has been addressed in the following products:

  RHEV 3.X Hypervisor and Agents for RHEL-6
  RHEV 3.X Hypervisor and Agents for RHEL-7 ELS

Via RHSA-2018:0046 https://access.redhat.com/errata/RHSA-2018:0046
Comment 25 errata-xmlrpc 2018-01-05 15:54:26 UTC 
This issue has been addressed in the following products:

  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2018:0047 https://access.redhat.com/errata/RHSA-2018:0047
Comment 26 errata-xmlrpc 2018-01-05 16:00:00 UTC 
This issue has been addressed in the following products:

  RHEV 3.X Hypervisor and Agents for RHEL-7

Via RHSA-2018:0044 https://access.redhat.com/errata/RHSA-2018:0044
Comment 27 errata-xmlrpc 2018-01-05 16:08:27 UTC 
This issue has been addressed in the following products:

  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2018:0045 https://access.redhat.com/errata/RHSA-2018:0045
Comment 28 errata-xmlrpc 2018-01-15 21:38:09 UTC 
This issue has been addressed in the following products:

  CloudForms Management Engine 4.1

Via RHSA-2018:0089 https://access.redhat.com/errata/RHSA-2018:0089
Comment 29 errata-xmlrpc 2018-01-15 21:41:02 UTC 
This issue has been addressed in the following products:

  CloudForms Management Engine 4.2

Via RHSA-2018:0090 https://access.redhat.com/errata/RHSA-2018:0090
Comment 30 errata-xmlrpc 2018-01-15 21:44:32 UTC 
This issue has been addressed in the following products:

  CloudForms Management Engine 4.5

Via RHSA-2018:0091 https://access.redhat.com/errata/RHSA-2018:0091
Comment 31 errata-xmlrpc 2018-01-16 21:01:08 UTC 
This issue has been addressed in the following products:

  CloudForms Management Engine 5.5

Via RHSA-2018:0092 https://access.redhat.com/errata/RHSA-2018:0092
Comment 32 errata-xmlrpc 2018-01-25 11:29:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0151 https://access.redhat.com/errata/RHSA-2018:0151
Comment 33 errata-xmlrpc 2018-01-25 12:01:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Extended Update Support

Via RHSA-2018:0182 https://access.redhat.com/errata/RHSA-2018:0182
Comment 34 errata-xmlrpc 2018-02-09 12:58:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5 Extended Lifecycle Support

Via RHSA-2018:0292 https://access.redhat.com/errata/RHSA-2018:0292
Comment 35 errata-xmlrpc 2018-03-07 15:26:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5.9 Long Life

Via RHSA-2018:0464 https://access.redhat.com/errata/RHSA-2018:0464
Comment 36 errata-xmlrpc 2018-03-13 14:46:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.7 Extended Update Support

Via RHSA-2018:0496 https://access.redhat.com/errata/RHSA-2018:0496
Comment 37 errata-xmlrpc 2018-03-13 15:36:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0502 https://access.redhat.com/errata/RHSA-2018:0502
Comment 38 errata-xmlrpc 2018-03-13 18:25:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:0512 https://access.redhat.com/errata/RHSA-2018:0512
Comment 39 errata-xmlrpc 2018-04-10 05:09:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0654 https://access.redhat.com/errata/RHSA-2018:0654
Comment 40 errata-xmlrpc 2018-04-10 09:35:00 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
Comment 41 errata-xmlrpc 2018-04-17 15:33:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Extended Update Support

Via RHSA-2018:1129 https://access.redhat.com/errata/RHSA-2018:1129
Comment 43 errata-xmlrpc 2018-05-08 18:59:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1319 https://access.redhat.com/errata/RHSA-2018:1319
Comment 44 errata-xmlrpc 2018-05-08 20:55:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.7 Extended Update Support

Via RHSA-2018:1346 https://access.redhat.com/errata/RHSA-2018:1346
Comment 45 errata-xmlrpc 2018-05-08 21:48:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.4 Advanced Update Support

Via RHSA-2018:1349 https://access.redhat.com/errata/RHSA-2018:1349
Comment 46 errata-xmlrpc 2018-05-08 21:50:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.6 Advanced Update Support
  Red Hat Enterprise Linux 6.6 Telco Extended Update Support

Via RHSA-2018:1351 https://access.redhat.com/errata/RHSA-2018:1351
Comment 47 errata-xmlrpc 2018-05-08 21:51:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 Advanced Update Support

Via RHSA-2018:1350 https://access.redhat.com/errata/RHSA-2018:1350
Comment 51 errata-xmlrpc 2019-05-08 12:31:37 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization Engine 4.3

Via RHSA-2019:1046 https://access.redhat.com/errata/RHSA-2019:1046
Comment 52 Doran Moppert 2020-03-27 02:43:03 UTC 
Statement:

Please see the Vulnerability Response article for the full list of updates available and a detailed discussion of this issue.

Meltdown patches for 32-bit Red Hat Enterprise Linux 5
------------------------------------------------------

Red Hat has no current plans to provide mitigations for the Meltdown vulnerability in 32-bit Red Hat Enterprise Linux 5 environments.

Following many hours of engineering investigation and analysis, Red Hat has determined that introducing changes to the Red Hat Enterprise Linux 5 environment would destabilize customer deployments and violate our  application binary interface (ABI) and kernel ABI commitments to customers who rely on Red Hat Enterprise Linux 5 to be absolutely stable.

Although Red Hat has delivered patches to mitigate the Meltdown vulnerability in other supported product offerings, the 32-bit Red Hat Enterprise Linux 5 environment presents unique challenges.  The combination of limited address space in 32-bit environments plus the mechanism for passing control from the userspace to kernel and limitations on the stack during this transfer make the projected changes too invasive and disruptive for deployments that require the highest level of system stability.  By contrast, 32-bit Meltdown mitigations have been delivered for Red Hat Enterprise Linux 6, where the changes are far less invasive and risky.
Comment 53 Doran Moppert 2020-03-27 02:43:08 UTC 
External References:

https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html
https://spectreattack.com/
https://meltdownattack.com
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