Input validation error in Puppet Enterprise - CVE-2016-9686
Published: February 9, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU39671
CSH Severity: Medium
CVSS v4.0: 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-2016-9686
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Puppet Labs
Affected software:
Puppet Enterprise
Puppet Enterprise
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The Puppet Communications Protocol (PCP) Broker incorrectly validates message header sizes. An attacker could use this to crash the PCP Broker, preventing commands from being sent to agents. This is resolved in Puppet Enterprise 2016.4.3 and 2016.5.2.
How to mitigate CVE-2016-9686
Install update from vendor's website.