Exim deliver_message() Function Remote Command Execution Vulnerability (Remote) - Nessus

Critical   Plugin ID: 127100

This page contains detailed information about the Exim deliver_message() Function Remote Command Execution Vulnerability (Remote) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 127100
Name: Exim deliver_message() Function Remote Command Execution Vulnerability (Remote)
Filename: exim_deliver_message_cmd_exec.nbin
Vulnerability Published: 2019-06-05
This Plugin Published: 2019-07-29
Last Modification Time: 2022-02-25
Plugin Version: 1.27
Plugin Type: remote
Plugin Family: SMTP problems
Dependencies: smtpserver_detect.nasl

Vulnerability Information

Severity: Critical
Vulnerability Published: 2019-06-05
Patch Published: 2019-06-05
CVE [?]: CVE-2019-10149
CPE [?]: cpe:/a:exim:exim
Exploited by Malware: True

Synopsis

The remote mail server is affected by a remote command execution vulnerability.

Description

The version of Exim on the remote host is affected by a remote command execution vulnerability in the deliver_message() function of '/src/deliver.c'. An unauthenticated remote attacker can exploit this, via a crafted message, to execute arbitrary command. Nessus was able to cause the remote host to ping the scanner.

Solution

Upgrade to a patched version of Exim.

Public Exploits

Target Network Port(s): 25
Target Asset(s): Services/smtp
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Immunity Canvas)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Exim deliver_message() Function Remote Command Execution Vulnerability (Remote) vulnerability:

  1. Metasploit: exploit/linux/local/exim4_deliver_message_priv_esc
    [Exim 4.87 - 4.91 Local Privilege Escalation]
  2. Exploit-DB: exploits/linux/local/46996.sh
    [EDB-46996: Exim 4.87 - 4.91 - Local Privilege Escalation]
  3. Exploit-DB: exploits/linux/local/47307.rb
    [EDB-47307: Exim 4.87 / 4.91 - Local Privilege Escalation (Metasploit)]
  4. Exploit-DB: exploits/linux/remote/46974.txt
    [EDB-46974: Exim 4.87 < 4.91 - (Local / Remote) Command Execution]
  5. GitHub: https://github.com/0xdea/exploits
    [CVE-2019-10149]
  6. GitHub: https://github.com/ChrissHack/exim.exp
    [CVE-2019-10149]
  7. GitHub: https://github.com/Stick-U235/CVE-2019-10149-Exploit
    [CVE-2019-10149: Exploit for CVE-2019-10149]
  8. GitHub: https://github.com/cloudflare/exim-cve-2019-10149-data
    [CVE-2019-10149: Data Collection Related to Exim CVE-2019-10149]
  9. GitHub: https://github.com/dhn/exploits
    [CVE-2019-10149]
  10. GitHub: https://github.com/hackerhouse-opensource/exploits
    [CVE-2019-10149]
  11. GitHub: https://github.com/x418x/libaz
    [CVE-2019-10149]
  12. GitHub: https://github.com/aishee/CVE-2019-10149-quick
    [CVE-2019-10149: Simple Bash shell quick fix CVE-2019-10149]
  13. GitHub: https://github.com/area1/exim-cve-2019-10149-data
    [CVE-2019-10149: Data Collection Related to Exim CVE-2019-10149]
  14. GitHub: https://github.com/AzizMea/CVE-2019-10149-privilege-escalation
    [CVE-2019-10149: CVE-2019-10149 privilege escalation]
  15. GitHub: https://github.com/Brets0150/StickyExim
    [CVE-2019-10149: Exim Honey Pot for CVE-2019-10149 exploit attempts.]
  16. GitHub: https://github.com/Chris-dev1/exim.exp
    [CVE-2019-10149]
  17. GitHub: https://github.com/darsigovrustam/CVE-2019-10149
    [CVE-2019-10149: Instructions for installing a vulnerable version of Exim and its expluatation]
  18. GitHub: https://github.com/Diefunction/CVE-2019-10149
    [CVE-2019-10149: CVE-2019-10149 : A flaw was found in Exim versions 4.87 to 4.91 (inclusive). ...]
  19. GitHub: https://github.com/Dilshan-Eranda/CVE-2019-10149
    [CVE-2019-10149: SNP Assignment on a Linux vulnerability]
  20. GitHub: https://github.com/MNEMO-CERT/PoC--CVE-2019-10149_Exim
    [CVE-2019-10149: PoC for CVE-2019-10149, this vulnerability could be xploited betwen 4-87 to 4.91 ...]
  21. GitHub: https://github.com/bananaphones/exim-rce-quickfix
    [CVE-2019-10149: quick fix for CVE-2019-10149, works on DebianUbuntuCentos]
  22. GitHub: https://github.com/cowbe0x004/eximrce-CVE-2019-10149
    [CVE-2019-10149: Simple python socket connection to test if exim is vulnerable to CVE-2019-10149. The ...]
  23. Immunity Canvas: CANVAS

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2019-10149
CVSS V2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C
CVSS Base Score:10.0 (High)
Impact Subscore:10.0
Exploitability Subscore:10.0
CVSS Temporal Score:8.7 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:8.7 (High)
CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
CVSS Base Score:9.8 (Critical)
Impact Subscore:5.9
Exploitability Subscore:3.9
CVSS Temporal Score:9.4 (Critical)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:9.4 (Critical)

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Plugin Source

The exim_deliver_message_cmd_exec.nbin Nessus plugin is distributed in a propriatory binary format and its source code is protected. This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/exim_deliver_message_cmd_exec.nbin
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\exim_deliver_message_cmd_exec.nbin
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/exim_deliver_message_cmd_exec.nbin

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How to Run

Here is how to run the Exim deliver_message() Function Remote Command Execution Vulnerability (Remote) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select SMTP problems plugin family.
  6. On the right side table select Exim deliver_message() Function Remote Command Execution Vulnerability (Remote) plugin ID 127100.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl exim_deliver_message_cmd_exec.nbin -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a exim_deliver_message_cmd_exec.nbin -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - exim_deliver_message_cmd_exec.nbin -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state exim_deliver_message_cmd_exec.nbin -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: See also: Similar and related Nessus plugins:
  • 125739 - Amazon Linux AMI : exim (ALAS-2019-1221)
  • 125742 - Debian DSA-4456-1 : exim4 - security update
  • 125737 - Exim 4.87 < 4.92 Remote Command Execution
  • 125749 - FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2)
  • 125751 - GLSA-201906-01 : Exim: Remote command execution
  • 125843 - openSUSE Security Update : exim (openSUSE-2019-1524)
  • 149614 - openSUSE Security Update : exim (openSUSE-2021-677) (Stack Clash)
  • 125770 - Ubuntu 18.04 LTS / 18.10 : exim4 vulnerability (USN-4010-1)
  • 107149 - Exim < 4.90.1 Buffer Overflow RCE Vulnerability
  • 128553 - Exim < 4.92.2
  • 129470 - Exim 4.92.x < 4.92.3 Heap Buffer Overflow
  • 149260 - Exim < 4.94.2 Multiple Vulnerabilities (21Nails)
  • 104815 - Exim < 4.89.1 Use-After-Free BDAT Remote Code Execution
  • 51179 - Exim string_format Function Remote Overflow
  • 66373 - Exim with Dovecot use_shell Command Injection
  • 29830 - ClamAV clamav-milter black-hole-mode Sendmail Recipient Field Arbitrary Command Execution
  • 10247 - Sendmail DEBUG/WIZ Remote Command Execution
  • 78701 - Mail Transfer Agent and Mail Delivery Agent Remote Command Execution via Shellshock
  • 77969 - Postfix Script Remote Command Execution via Shellshock
  • 77970 - Qmail Remote Command Execution via Shellshock

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file exim_deliver_message_cmd_exec.nbin version 1.27. For more plugins, visit the Nessus Plugin Library.

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