FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2) - Nessus

Critical Plugin ID: 125749

This page contains detailed information about the FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2) 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 125749
Name: FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2)
Filename: freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl
Vulnerability Published: 2019-05-27
This Plugin Published: 2019-06-07
Last Modification Time: 2022-02-25
Plugin Version: 1.11
Plugin Type: local
Plugin Family: FreeBSD Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/FreeBSD/pkg_info, Host/FreeBSD/release, Host/local_checks_enabled

Vulnerability Information

Severity: Critical
Vulnerability Published: 2019-05-27
Patch Published: 2019-06-06
CVE [?]: CVE-2019-10149
CPE [?]: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:exim
Exploited by Malware: True
In the News: True

Synopsis

The remote FreeBSD host is missing a security-related update.

Description

Exim team and Qualys report :

We received a report of a possible remote exploit. Currently there is no evidence of an active use of this exploit.

A patch exists already, is being tested, and backported to all versions we released since (and including) 4.87.

The severity depends on your configuration. It depends on how close to the standard configuration your Exim runtime configuration is. The closer the better.

Exim 4.92 is not vulnerable.

Solution

Update the affected package.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
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 FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2) vulnerability:

Metasploit: exploit/linux/local/exim4_deliver_message_priv_esc
[Exim 4.87 - 4.91 Local Privilege Escalation]
Exploit-DB: exploits/linux/local/46996.sh
[EDB-46996: Exim 4.87 - 4.91 - Local Privilege Escalation]
Exploit-DB: exploits/linux/local/47307.rb
[EDB-47307: Exim 4.87 / 4.91 - Local Privilege Escalation (Metasploit)]
Exploit-DB: exploits/linux/remote/46974.txt
[EDB-46974: Exim 4.87 < 4.91 - (Local / Remote) Command Execution]
GitHub: https://github.com/0xdea/exploits
[CVE-2019-10149]
GitHub: https://github.com/ChrissHack/exim.exp
[CVE-2019-10149]
GitHub: https://github.com/Stick-U235/CVE-2019-10149-Exploit
[CVE-2019-10149: Exploit for CVE-2019-10149]
GitHub: https://github.com/cloudflare/exim-cve-2019-10149-data
[CVE-2019-10149: Data Collection Related to Exim CVE-2019-10149]
GitHub: https://github.com/dhn/exploits
[CVE-2019-10149]
GitHub: https://github.com/hackerhouse-opensource/exploits
[CVE-2019-10149]
GitHub: https://github.com/x418x/libaz
[CVE-2019-10149]
GitHub: https://github.com/aishee/CVE-2019-10149-quick
[CVE-2019-10149: Simple Bash shell quick fix CVE-2019-10149]
GitHub: https://github.com/area1/exim-cve-2019-10149-data
[CVE-2019-10149: Data Collection Related to Exim CVE-2019-10149]
GitHub: https://github.com/AzizMea/CVE-2019-10149-privilege-escalation
[CVE-2019-10149: CVE-2019-10149 privilege escalation]
GitHub: https://github.com/Brets0150/StickyExim
[CVE-2019-10149: Exim Honey Pot for CVE-2019-10149 exploit attempts.]
GitHub: https://github.com/Chris-dev1/exim.exp
[CVE-2019-10149]
GitHub: https://github.com/darsigovrustam/CVE-2019-10149
[CVE-2019-10149: Instructions for installing a vulnerable version of Exim and its expluatation]
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). ...]
GitHub: https://github.com/Dilshan-Eranda/CVE-2019-10149
[CVE-2019-10149: SNP Assignment on a Linux vulnerability]
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 ...]
GitHub: https://github.com/bananaphones/exim-rce-quickfix
[CVE-2019-10149: quick fix for CVE-2019-10149, works on DebianUbuntuCentos]
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 ...]
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

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2022 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(125749);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/25");

  script_cve_id("CVE-2019-10149");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/07/10");
  script_xref(name:"CISA-NCAS", value:"AA22-011A");

  script_name(english:"FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Exim team and Qualys report :

We received a report of a possible remote exploit. Currently there is
no evidence of an active use of this exploit.

A patch exists already, is being tested, and backported to all
versions we released since (and including) 4.87.

The severity depends on your configuration. It depends on how close to
the standard configuration your Exim runtime configuration is. The
closer the better.

Exim 4.92 is not vulnerable."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.exim.org/static/doc/security/CVE-2019-10149.txt"
  );
  # https://vuxml.freebsd.org/freebsd/45bea6b5-8855-11e9-8d41-97657151f8c2.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?48eb73b3"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-10149");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Exim 4.87 - 4.91 Local Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:exim");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/05/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/07");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"exim>=4.87<4.92")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl

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How to Run

Here is how to run the FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select FreeBSD Local Security Checks plugin family.
On the right side table select FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2) plugin ID 125749.
Specify the target on the Settings tab and click to Save the scan.
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 freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl -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 freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl -t <IP/HOST>

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References

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
127100 - Exim deliver_message() Function Remote Command Execution Vulnerability (Remote)
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)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file freebsd_pkg_45bea6b5885511e98d4197657151f8c2.nasl version 1.11. For more plugins, visit the Nessus Plugin Library.

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FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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