CVE-2018-3639 hw: cpu: speculative store bypass

CVE ID

CVE-2018-3639

DESCRIPTION

An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently 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 read privileged memory by conducting targeted cache side-channel attacks.

CVSS3 Base Score  5.5 Medium

RESOLUTION

Resolution:
Apply Unitrends security update v10.29 from 07/27/2018 or later,
    containing kernel-2.6.32-754.2.1.el6

LINK TO ADVISORIES

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