#VU39662 Improper access control in Puppet Enterprise - CVE-2016-2787

Vulnerability identifier: #VU39662

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2787

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Puppet Enterprise
Client/Desktop applications / Software for system administration

Vendor: Puppet Labs

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Puppet Enterprise: 2015.3 - 2015.3.2

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External links
https://puppet.com/security/cve/CVE-2016-2787

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.