Bug 1581650 (CVE-2018-3693) - CVE-2018-3693 Kernel: speculative bounds check bypass store
Summary: CVE-2018-3693 Kernel: speculative bounds check bypass store
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-3693
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: 1589032 1589033 1589034 1589035 1589036 1589037 1590090 1590091 1590092 1590093 1590094 1590095 1590096 1590097 1590098 1590099 1590100 1599832 1599833
Blocks: 1581208 1595197 1595198 1595199 1595200
TreeView+ depends on / blocked
 
Reported: 2018-05-23 10:00 UTC by Prasad Pandit
Modified: 2021-12-10 16:12 UTC (History)
58 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 past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to influence speculative execution and/or read privileged memory by conducting targeted cache side-channel attacks.
Clone Of:
Environment:
Last Closed: 2018-11-21 11:27:31 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2384 0 None None None 2018-08-14 18:44:52 UTC
Red Hat Product Errata RHSA-2018:2390 0 None None None 2018-08-14 18:26:28 UTC
Red Hat Product Errata RHSA-2018:2395 0 None None None 2018-08-14 20:24:25 UTC
Red Hat Product Errata RHSA-2019:1946 0 None None None 2019-07-30 09:09:02 UTC
Red Hat Product Errata RHSA-2020:0174 0 None None None 2020-01-21 15:49:33 UTC

Description Prasad Pandit 2018-05-23 10:00:19 UTC 
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check.

It relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire).

As a result, an unprivileged attacker could use this flaw to influence speculative execution and/or read privileged memory by conducting targeted cache side-channel attacks.
Comment 3 Prasad Pandit 2018-06-19 09:24:48 UTC 
Statement:

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2 may address this issue.
Comment 6 Prasad Pandit 2018-07-10 09:53:35 UTC 
Acknowledgments:

Name: Vladimir Kiriansky (MIT), Carl Waldspurger (Carl Waldspurger Consulting)
Comment 7 Prasad Pandit 2018-07-10 17:08:31 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1599832]
Comment 9 Yogendra Jog 2018-07-10 17:10:07 UTC 
External References:

https://access.redhat.com/solutions/3523601
https://people.csail.mit.edu/vlk/spectre11.pdf
https://01.org/security/advisories/intel-oss-10002
https://software.intel.com/sites/default/files/managed/4e/a1/337879-analyzing-potential-bounds-Check-bypass-vulnerabilities.pdf
Comment 10 errata-xmlrpc 2018-08-14 18:26:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:2390 https://access.redhat.com/errata/RHSA-2018:2390
Comment 11 errata-xmlrpc 2018-08-14 18:44:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2384 https://access.redhat.com/errata/RHSA-2018:2384
Comment 12 errata-xmlrpc 2018-08-14 20:24:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2395 https://access.redhat.com/errata/RHSA-2018:2395
Comment 13 Justin M. Forbes 2018-08-20 17:17:34 UTC 
The kernel portion has been addressed with kernel-4.17.15 across all fedora stable releases.
Comment 14 errata-xmlrpc 2019-07-30 09:09:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Extended Update Support

Via RHSA-2019:1946 https://access.redhat.com/errata/RHSA-2019:1946
Comment 15 errata-xmlrpc 2020-01-21 15:49:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:0174 https://access.redhat.com/errata/RHSA-2020:0174
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