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Amazon Linux AMI : kernel (ALAS-2018-971)

medium Nessus Plugin ID 108414

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Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c :

A flaw was found in the Linux kernel's implementation of 32-bit syscall interface for bridging. This allowed a privileged user to arbitrarily write to a limited range of kernel memory. (CVE-2018-1068)

Solution

Run 'yum update kernel' to update your system. You will need to reboot your system in order for the new kernel to be running.

See Also

https://alas.aws.amazon.com/ALAS-2018-971.html

Plugin Details

Severity: Medium

ID: 108414

File Name: ala_ALAS-2018-971.nasl

Version: 1.4

Type: local

Agent: unix

Published: 3/19/2018

Updated: 8/31/2018

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

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

CVSS v3

Risk Factor: Medium

Base Score: 6.7

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-debuginfo-common-i686, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:kernel-doc, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:perf-debuginfo, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Patch Publication Date: 3/16/2018

Reference Information

CVE: CVE-2018-1068

ALAS: 2018-971