1) Speculative Store Bypass

EUVDB-ID: #VU12911

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2018-3639

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.

The weakness exists due to race conditions in CPU cache processing. A local attacker can conduct a side-channel attack to exploit a flaw in the speculative execution of Load and Store instructions to read privileged memory.

Note: the vulnerability is referred to as "Spectre variant 4".

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 6.7

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 6.7

Red Hat Enterprise Linux Server - Extended Update Support: 6.7

kernel (Red Hat package): 2.6.32-71.7.1.el6 - 2.6.32-573.59.1.el6

Red Hat Enterprise Linux EUS Compute Node: 6.7

:

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CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power\,_big_endian_-_extended_update_support:6.7:*:*:*:*:red_hat_enterprise_linux:*:*

External links

http://access.redhat.com/errata/RHSA-2018:2250

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?