GNU Bash Incomplete Fix Remote Code Injection (Shellshock)

Critical Nessus Plugin ID 82581

Synopsis

The remote web server is affected by a remote code execution vulnerability.

Description

The remote web server is affected by a command injection vulnerability in GNU Bash known as Shellshock. The vulnerability is due to the processing of trailing strings after function definitions in the values of environment variables. This allows a remote attacker to execute arbitrary code via environment variable manipulation depending on the configuration of the system.

Note that this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.

Solution

Apply the referenced patch.

See Also

http://lcamtuf.blogspot.com/2014/10/bash-bug-how-we-finally-cracked.html

http://www.nessus.org/u?dacf7829

Plugin Details

Severity: Critical

ID: 82581

File Name: bash_cve_2014_6278.nasl

Version: 1.12

Type: remote

Family: CGI abuses

Published: 2015/04/06

Updated: 2019/11/22

Dependencies: 10107, 67257

Risk Information

Risk Factor: Critical

CVSS Score Source: CVE-2014-6278

CVSS v2.0

Base Score: 10

Temporal Score: 8.3

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

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

CVSS v3.0

Base Score: 9.8

Temporal Score: 9

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

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

Vulnerability Information

CPE: cpe:/a:gnu:bash

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2014/09/28

Vulnerability Publication Date: 2014/09/26

Exploitable With

Core Impact

Metasploit (CUPS Filter Bash Environment Variable Code Injection (Shellshock))

Reference Information

CVE: CVE-2014-6278

BID: 70166

IAVA: 2014-A-0142