Vulnerabilities > CVE-2016-2788 - Improper Access Control vulnerability in Puppet Marionette Collective and Puppet Enterprise

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
puppet
CWE-284
nessus

Summary

MCollective 2.7.0 and 2.8.x before 2.8.9, as used in Puppet Enterprise, allows remote attackers to execute arbitrary code via vectors related to the mco ping command.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.

Nessus

NASL familyCGI abuses
NASL idPUPPET_ENTERPRISE_2016_2_1.NASL
descriptionAccording to its self-reported version number, the Puppet Enterprise application running on the remote host is version prior to 2016.2.1. It is, therefore, affected by the following vulnerabilities : - A remote code execution vulnerability exists in the mcollective puppet-agent plugin due to an insecure argument. An unauthenticated, remote attacker can exploit this to enable remote code execution . (CVE-2015-7331) - A flaw exists in the Puppet Enterprise Console due to unsafe string processing that allows an authenticated, remote attacker to execute arbitrary code. (CVE-2016-2788)
last seen2020-06-01
modified2020-06-02
plugin id129753
published2019-10-09
reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/129753
titlePuppet Enterprise < 2016.2.1 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(129753);
  script_version("1.2");
  script_cvs_date("Date: 2019/10/17 14:31:04");

  script_cve_id("CVE-2015-7331", "CVE-2016-2788");
  script_bugtraq_id(92096, 92432);

  script_name(english:"Puppet Enterprise < 2016.2.1 Multiple Vulnerabilities");
  script_summary(english:"Checks the Puppet Enterprise version.");

  script_set_attribute(attribute:"synopsis", value:
"A web application running on the remote host is affected by multiple
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Puppet Enterprise
application running on the remote host is version 
prior to 2016.2.1. It is, therefore, affected by the following 
vulnerabilities :

  - A remote code execution vulnerability exists in the mcollective
    puppet-agent plugin due to an insecure argument. An 
    unauthenticated, remote attacker can exploit this to 
    enable remote code execution .  (CVE-2015-7331)

  - A flaw exists in the Puppet Enterprise Console due to
    unsafe string processing that allows an authenticated,
    remote attacker to execute arbitrary code. (CVE-2016-2788)");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/CVE-2015-7331");
  script_set_attribute(attribute:"see_also", value:"https://puppet.com/security/cve/CVE-2016-2788");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Puppet Enterprise version 2016.2.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-2788");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/08/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/09");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:puppetlabs:puppet");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("puppet_enterprise_console_detect.nasl", "puppet_rest_detect.nasl");
  script_require_keys("puppet/rest_port", "installed_sw/puppet_enterprise_console");

  exit(0);
}

include('vcf.inc');
include('http.inc');

app = 'Puppet REST API'; # we get both enterprise and open-source versions from the api...

# Make sure we detected a version 
port = get_kb_item_or_exit('puppet/rest_port');
ver = get_kb_item_or_exit('puppet/' + port + '/version');

# Make sure the Console service is running
get_kb_item_or_exit('installed_sw/puppet_enterprise_console');

app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE, kb_ver: 'puppet/' + port + '/version');

# version info obtained from https://puppet.com/docs/pe/2016.2/overview_version_table.html
constraints = [
  {"min_version" : "3.0.0", "fixed_version" : "3.8.6", "fixed_display" : "Puppet Enterprise 3.8.6"},
  {"min_version" : "4.0.0", "fixed_version" : "4.5.2", "fixed_display" : "Puppet Enterprise (2016.2.1)"}
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);