Vulnerabilities > CVE-2016-2787 - Improper Access Control vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
The Puppet Communications Protocol in Puppet Enterprise 2015.3.x before 2015.3.3 does not properly validate certificates for the broker node, which allows remote non-whitelisted hosts to prevent runs from triggering via unspecified vectors.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 | |
| Application | 1 |
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 family | CGI abuses |
| NASL id | PUPPET_ENTERPRISE_2015_3_3.NASL |
| description | According to its self-reported version number, the Puppet Enterprise application running on the remote host is version 2015.x prior to 2015.3.3. It is, therefore, affected by the following vulnerabilities : - A invalid validation of the server certificate by the pxp-agent. An unauthenticated, remote attacker can impersonate a broker and issue commands to the agent. This requires a secondary attack which forces the agent to connect to the malicious broker. (CVE-2016-2786) - A denial of service vulnerability exists due to the incorrect validation of the broker node certificates. An unauthenticated, remote attacker can prevent the puppet communications protocol from triggering runs. (CVE-2016-2787) |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 129752 |
| published | 2019-10-09 |
| reporter | This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/129752 |
| title | Puppet Enterprise 2015.x < 2015.3.3 Multiple Vulnerabilities |
| code | |