Postfix Script Remote Command Execution via Shellshock

critical Nessus Plugin ID 77969

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Synopsis

The remote mail server uses scripts that allow remote command execution via Shellshock.

Description

The remote host appears to be running Postfix. Postfix itself is not vulnerable to Shellshock; however, any bash script Postfix runs for filtering or other tasks could potentially be affected if the script exports an environmental variable from the content or headers of a message.

A negative result from this plugin does not prove conclusively that the remote system is not affected by Shellshock, only that any scripts Postfix may be running do not create the conditions that are exploitable via the Shellshock flaw.

Solution

Apply the referenced Bash patch or remove the Postfix scripts.

Plugin Details

Severity: Critical

ID: 77969

File Name: shellshock_postfix_filters.nasl

Version: 1.16

Type: remote

Family: SMTP problems

Published: 9/29/2014

Updated: 12/5/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

CVSS Score Source: CVE-2014-7169

Vulnerability Information

CPE: cpe:/a:gnu:bash, cpe:/a:postfix:postfix

Required KB Items: Settings/ThoroughTests

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/26/2014

Vulnerability Publication Date: 9/24/2014

CISA Known Exploited Vulnerability Due Dates: 7/28/2022

Exploitable With

Core Impact

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

Reference Information

CVE: CVE-2014-6271, CVE-2014-7169

BID: 70103, 70137

CERT: 252743

IAVA: 2014-A-0142

Detections

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