GLSA-201906-01 : Exim: Remote command execution - Nessus

Critical Plugin ID: 125751

This page contains detailed information about the GLSA-201906-01 : Exim: Remote command execution 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: 125751
Name: GLSA-201906-01 : Exim: Remote command execution
Filename: gentoo_GLSA-201906-01.nasl
Vulnerability Published: 2019-06-05
This Plugin Published: 2019-06-07
Last Modification Time: 2022-02-25
Plugin Version: 1.13
Plugin Type: local
Plugin Family: Gentoo Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/Gentoo/qpkg-list, Host/Gentoo/release, Host/local_checks_enabled

Vulnerability Information

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

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-201906-01 (Exim: Remote command execution)

A vulnerability was discovered in how Exim validates recipient addresses in the deliver_message() function. Impact :

A remote attacker could execute arbitrary commands by sending an email with a specially crafted recipient address to the affected system. Workaround :

There is no known workaround at this time.

Solution

All Exim users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=mail-mta/exim-4.92'

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 GLSA-201906-01 : Exim: Remote command execution 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 Gentoo Linux Security Advisory GLSA 201906-01.
#
# The advisory text is Copyright (C) 2001-2022 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(125751);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/25");

  script_cve_id("CVE-2019-10149");
  script_xref(name:"GLSA", value:"201906-01");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/07/10");
  script_xref(name:"CISA-NCAS", value:"AA22-011A");

  script_name(english:"GLSA-201906-01 : Exim: Remote command execution");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote host is affected by the vulnerability described in GLSA-201906-01
(Exim: Remote command execution)

    A vulnerability was discovered in how Exim validates recipient addresses
      in the deliver_message() function.
  
Impact :

    A remote attacker could execute arbitrary commands by sending an email
      with a specially crafted recipient address to the affected system.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201906-01"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"All Exim users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=mail-mta/exim-4.92'"
  );
  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:gentoo:linux:exim");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/05");
  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:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"mail-mta/exim", unaffected:make_list("ge 4.92"), vulnerable:make_list("lt 4.92"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Exim");
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/gentoo_GLSA-201906-01.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\gentoo_GLSA-201906-01.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/gentoo_GLSA-201906-01.nasl

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How to Run

Here is how to run the GLSA-201906-01 : Exim: Remote command execution 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 Gentoo Local Security Checks plugin family.
On the right side table select GLSA-201906-01 : Exim: Remote command execution plugin ID 125751.
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 gentoo_GLSA-201906-01.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a gentoo_GLSA-201906-01.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - gentoo_GLSA-201906-01.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 gentoo_GLSA-201906-01.nasl -t <IP/HOST>

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References

GLSA | Gentoo Linux Security Advisory:

201906-01

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)
125749 - FreeBSD : Exim -- RCE in deliver_message() function (45bea6b5-8855-11e9-8d41-97657151f8c2)
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)
15826 - GLSA-200411-32 : phpBB: Remote command execution
15827 - GLSA-200411-33 : TWiki: Arbitrary command execution
18607 - GLSA-200507-03 : phpBB: Arbitrary command execution
18647 - GLSA-200507-06 : TikiWiki: Arbitrary command execution through XML-RPC
22460 - GLSA-200609-16 : Tikiwiki: Arbitrary command execution
27553 - GLSA-200710-21 : TikiWiki: Arbitrary command execution
86137 - GLSA-201509-06 : Git: Arbitrary command execution
100446 - GLSA-201705-14 : Smb4K: Arbitrary command execution as root
134604 - GLSA-202003-27 : libssh: Arbitrary command execution

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file gentoo_GLSA-201906-01.nasl version 1.13. For more plugins, visit the Nessus Plugin Library.

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GLSA-201906-01 : Exim: Remote command execution - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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