Cisco NX-OS GNU Bash Environment Variable Command Injection Vulnerability (cisco-sa-20140926-bash) (Shellshock)

critical Nessus Plugin ID 78693

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Synopsis

The remote device is running a version of NX-OS that is affected by Shellshock.

Description

According to its self-reported version, the remote NX-OS device is affected by a command injection vulnerability in GNU Bash known as Shellshock, which 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

Upgrade to the suggested fixed version referred to in the relevant Cisco bug ID. Note that some fixed versions have not been released yet. Please contact the vendor for details.

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: 78693

File Name: cisco-sa-20140926-bash-nxos.nasl

Version: 1.15

Type: combined

Family: CISCO

Published: 10/27/2014

Updated: 10/29/2019

Dependencies: cisco_nxos_version.nasl

Risk Information

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:/o:cisco:nx-os

Required KB Items: Host/Cisco/NX-OS/Version, Host/Cisco/NX-OS/Device, Host/Cisco/NX-OS/Model

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/15/2014

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