Amazon Linux 2 : kernel (ALAS-2019-1222) (SACK Panic) (SACK Slowness)

High Nessus Plugin ID 125954

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

CVE-2019-11477 , CVE-2019-11478 and CVE-2019-11479 describe vulnerabilities in the Linux kernel that can be remotely exploited using a specially crafted TCP connection, crashing the targeted system.

The latest Amazon Linux 2 AMIs as available in AWS EC2 already contain these kernels and are not vulnerable.

Solution

Run 'yum update kernel' and reboot to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2019-1222.html

Plugin Details

Severity: High

ID: 125954

File Name: al2_ALAS-2019-1222.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2019/06/18

Updated: 2020/01/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 5.8

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

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

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:kernel-devel, 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, p-cpe:/a:amazon:linux:python-perf, p-cpe:/a:amazon:linux:python-perf-debuginfo, cpe:/o:amazon:linux:2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2019/06/17

Vulnerability Publication Date: 2019/06/19

Reference Information

CVE: CVE-2019-11477, CVE-2019-11478, CVE-2019-11479

ALAS: 2019-1222