| Description: | Summary:
The remote host is missing an update for the 'intel-microcode' package(s) announced via the USN-3756-1 advisory.
Vulnerability Insight:
It was discovered that memory present in the L1 data cache of an Intel CPU
core may be exposed to a malicious process that is executing on the CPU
core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local
attacker in a guest virtual machine could use this to expose sensitive
information (memory from other guests or the host OS). (CVE-2018-3646)
Jann Horn and Ken Johnson discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory reads
via a sidechannel attack. This flaw is known as Spectre Variant 4. A local
attacker could use this to expose sensitive information, including kernel
memory. (CVE-2018-3639)
Zdenek Sojka, Rudolf Marek, Alex Zuepke, and Innokentiy Sennovskiy
discovered that microprocessors that perform speculative reads of
system registers may allow unauthorized disclosure of system parameters
via a sidechannel attack. This vulnerability is also known as Rogue
System Register Read (RSRE). An attacker could use this to expose
sensitive information. (CVE-2018-3640)
Affected Software/OS:
'intel-microcode' package(s) on Ubuntu 14.04, Ubuntu 16.04, Ubuntu 18.04.
Solution:
Please install the updated package(s).
CVSS Score:
4.7
CVSS Vector:
AV:L/AC:M/Au:N/C:C/I:N/A:N
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