Qmail Remote Command Execution via Shellshock

critical Nessus Plugin ID 77970

Synopsis

The remote mail server allows remote command execution via Shellshock.

Description

The remote host appears to be running Qmail. A remote attacker can exploit Qmail to execute commands via a specially crafted MAIL FROM header if the remote host has a vulnerable version of Bash. This is due to the fact that Qmail does not properly sanitize input before setting environmental variables.

A negative result from this plugin does not prove conclusively that the remote system is not affected by Shellshock, only that Qmail could not be used to exploit the Shellshock flaw.

Solution

Apply the referenced Bash patch.

See Also

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

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

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

Plugin Details

Severity: Critical

ID: 77970

File Name: shellshock_qmail.nasl

Version: 1.14

Type: remote

Published: 9/29/2014

Updated: 4/11/2022

Configuration: Enable thorough checks

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

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

CVSS Score Source: CVE-2014-7169

Vulnerability Information

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

Required KB Items: Settings/ThoroughTests

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Patch Publication Date: 9/26/2014

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, CVE-2014-7169

BID: 70103, 70137

CERT: 252743

IAVA: 2014-A-0142

EDB-ID: 34765, 34766, 34777