Cisco ASA Next-Generation Firewall GNU Bash Environment Variable Handling Command Injection (cisco-sa-20140926-bash) (Shellshock)

critical Nessus Plugin ID 78827
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Synopsis

The remote security device is missing a vendor-supplied security patch.

Description

The remote ASA Next-Generation Firewall (NGFW) host is missing a security patch. It is, therefore, 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.

Solution

Apply the relevant patch referenced in Cisco Security Advisory cisco-sa-20140926-bash.

See Also

http://www.nessus.org/u?df19d2c1

http://seclists.org/oss-sec/2014/q3/650

https://www.invisiblethreat.ca/post/shellshock/

Plugin Details

Severity: Critical

ID: 78827

File Name: cisco-sa-CSCur01959-asa-cx.nasl

Version: 1.14

Type: local

Family: CISCO

Published: 11/3/2014

Updated: 11/25/2019

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2014-7187

VPR

Risk Factor: Critical

Score: 9.8

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

Temporal Vector: E:H/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/h:cisco:adaptive_security_appliance

Required KB Items: Host/Cisco/ASA-CX/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/10/2014

Vulnerability Publication Date: 9/24/2014

Exploitable With

Core Impact

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

Reference Information

CVE: CVE-2014-6271, CVE-2014-6277, CVE-2014-6278, CVE-2014-7169, CVE-2014-7186, CVE-2014-7187

BID: 70103, 70137, 70152, 70154, 70165, 70166

CISCO-BUG-ID: CSCur01959

IAVA: 2014-A-0142

CISCO-SA: cisco-sa-20140926-bash

CERT: 252743

EDB-ID: 34765, 34766, 34777