Ubuntu 16.04 LTS : linux regression (USN-3522-3) (Meltdown)

Medium Nessus Plugin ID 105745

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VPR Score: 7.7

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

USN-3522-1 fixed a vulnerability in the Linux kernel to address Meltdown (CVE-2017-5754). Unfortunately, that update introduced a regression where a few systems failed to boot successfully. This update fixes the problem.

We apologize for the inconvenience.

Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory.

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 packages.

See Also

https://usn.ubuntu.com/3522-3/

Plugin Details

Severity: Medium

ID: 105745

File Name: ubuntu_USN-3522-3.nasl

Version: 3.11

Type: local

Agent: unix

Published: 2018/01/11

Updated: 2019/09/18

Dependencies: 12634, 122878

Risk Information

Risk Factor: Medium

VPR Score: 7.7

CVSS v2.0

Base Score: 4.7

Temporal Score: 4.1

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N

Temporal Vector: CVSS2#E:H/RL:OF/RC:C

CVSS v3.0

Base Score: 5.6

Temporal Score: 5.4

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

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency, cpe:/o:canonical:ubuntu_linux:16.04

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/01/10

Vulnerability Publication Date: 2018/01/04

Reference Information

CVE: CVE-2017-5754

USN: 3522-3

IAVA: 2018-A-0019