HTTP Response Splitting Affecting amazon-ssm-agent package, versions <0:3.2.1705.0-1.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.14% (51st percentile)

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  • Snyk IDSNYK-AMZN2-AMAZONSSMAGENT-6042973
  • published2 Nov 2023
  • disclosed11 Jul 2023

Introduced: 11 Jul 2023

CVE-2023-29406  (opens in a new tab)
CWE-113  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 amazon-ssm-agent to version 0:3.2.1705.0-1.amzn2 or higher.
This issue was patched in ALAS2-2023-2303.

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 HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject additional headers or entire requests. With fix, the HTTP/1 client now refuses to send requests containing an invalid Request.Host or Request.URL.Host value.

CVSS Scores

version 3.1