Amazon Linux AMI : bash (ALAS-2014-418) (Shellshock)

critical Nessus Plugin ID 78361

Synopsis

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

Description

This ALAS is superceded by ALAS-2014-419.

A flaw was found in the way Bash evaluated certain specially crafted environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue.

We'd like to also give credit to our colleagues at Red Hat for their excellent blog post summarizing this issue.

This ALAS is superceded by ALAS-2014-419.

Solution

Run 'yum update bash' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2014-418.html

https://alas.aws.amazon.com/ALAS-2014-419.html

Plugin Details

Severity: Critical

ID: 78361

File Name: ala_ALAS-2014-418.nasl

Version: 1.15

Type: local

Agent: unix

Published: 10/12/2014

Updated: 1/31/2022

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

CVSS v2

Risk Factor: Critical

Base Score: 10

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/25/2014

Vulnerability Publication Date: 9/24/2014

CISA Known Exploited Dates: 7/28/2022

Exploitable With

Core Impact

Metasploit (Qmail SMTP Bash Environment Variable Injection (Shellshock))

Reference Information

CVE: CVE-2014-6271

ALAS: 2014-418

IAVA: 2014-A-0142