HTTP Request Smuggling Affecting amazon-ssm-agent package, versions <0:3.3.3050.0-1.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-AMZN2-AMAZONSSMAGENT-13165814
  • published1 Oct 2025
  • disclosed8 Apr 2025

Introduced: 8 Apr 2025

CVE-2025-22871  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 amazon-ssm-agent to version 0:3.3.3050.0-1.amzn2 or higher.
This issue was patched in ALAS2-2025-3010.

NVD Description

Note: Versions mentioned in the description apply only to the upstream amazon-ssm-agent package and not the amazon-ssm-agent package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.

CVSS Base Scores

version 3.1