| Revision Date: | 2018-01-04 | Version: | 634 |
| Title: | RHSA-2018:0012: microcode_ctl security update (Important) |
| Description: | The microcode_ctl packages provide microcode updates for Intel and AMD processors.
Security Fix(es):
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-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation 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 cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5715)
Note: This is the microcode counterpart of the CVE-2017-5715 kernel mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
|
| Family: | unix | Class: | patch |
| Status: | | Reference(s): | RHSA-2018:0012
RHSA-2018:0012-00
RHSA-2018:0012-01
|
| Platform(s): | Red Hat Enterprise Linux 7
| Product(s): | |
| Definition Synopsis |
| Red Hat Enterprise Linux must be installed OR Package Information
Red Hat Enterprise Linux 7 is installed
AND microcode_ctl is earlier than 2:2.1-22.2.el7
AND microcode_ctl is signed with Red Hat redhatrelease2 key
|