| Description: | Summary:
The remote host is missing an update for the 'microcode_ctl'
package(s) announced via the referenced advisory.
Vulnerability Insight:
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.
Affected Software/OS:
microcode_ctl on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)
Solution:
Please Install the Updated Packages.
CVSS Score:
1.9
CVSS Vector:
AV:L/AC:M/Au:N/C:P/I:N/A:N
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