Ubuntu 16.04 LTS / 18.04 LTS / 19.04 / 19.10 : intel-microcode regression (USN-4182-3)

medium Nessus Plugin ID 131694
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Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

USN-4182-1 provided updated Intel Processor Microcode. A regression was discovered that caused some Skylake processors to hang after a warm reboot. This update reverts the microcode for that specific processor family.

We apologize for the inconvenience.

Original advisory details :

Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11135)

It was discovered that certain Intel Xeon processors did not properly restrict access to a voltage modulation interface.
A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2019-11139).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected intel-microcode package.

See Also

https://usn.ubuntu.com/4182-3/

Plugin Details

Severity: Medium

ID: 131694

File Name: ubuntu_USN-4182-3.nasl

Version: 1.3

Type: local

Agent: unix

Published: 12/4/2019

Updated: 12/13/2019

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-11135

VPR

Risk Factor: High

Score: 7.7

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:intel-microcode, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:19.04, cpe:/o:canonical:ubuntu_linux:19.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 12/4/2019

Vulnerability Publication Date: 11/14/2019

Reference Information

CVE: CVE-2019-11135, CVE-2019-11139

USN: 4182-3