CVE-2017-2295: Debian Linux
High severity, CVSS 8.2. EPSS: 2.4% chance of exploitation in the next 30 days.
Versions of Puppet prior to 4.10.1 will deserialize data off the wire (from the agent to the server, in this case) with a attacker-specified format. This could be used to force YAML deserialization in an unsafe manner, which would lead to remote code execution. This change constrains the format of data on the wire to PSON or safely decoded YAML.
Affected products
Published 2017-07-05. Last modified 2026-06-17.