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Amazon Linux AMI : authconfig (ALAS-2017-875)

medium Nessus Plugin ID 102863

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Synopsis

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

Description

Information leak when SSSD is used for authentication against remote server :

A flaw was found where authconfig could configure sssd in a way that treats existing and non-existing logins differently, leaking information on existence of a user. An attacker with physical or network access to the machine could enumerate users via a timing attack.(CVE-2017-7488)

Solution

Run 'yum update authconfig' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2017-875.html

Plugin Details

Severity: Medium

ID: 102863

File Name: ala_ALAS-2017-875.nasl

Version: 3.4

Type: local

Agent: unix

Published: 9/1/2017

Updated: 4/18/2018

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

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4

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

CVSS v3

Risk Factor: Medium

Base Score: 4.3

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:authconfig-debuginfo, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:authconfig

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

Patch Publication Date: 8/30/2017

Reference Information

CVE: CVE-2017-7488

ALAS: 2017-875