Deserialization of Untrusted Data Affecting puppet3-server package, versions <0:3.7.4-1.13.amzn1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN201803-PUPPET3SERVER-1706888
- published27 Sept 2021
- disclosed5 Jul 2017
Introduced: 5 Jul 2017
CVE-2017-2295 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 puppet3-server to version 0:3.7.4-1.13.amzn1 or higher.
This issue was patched in ALAS-2017-849.
NVD Description
Note: Versions mentioned in the description apply only to the upstream puppet3-server package and not the puppet3-server package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.
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.