CVE-2025-9039

Information Disclosure in Amazon ECS Container Agent

State: Published
Severity: 5.3 Medium
Published: Aug 14, 2025
Updated: Aug 14, 2025
Reserved: Aug 14, 2025

Description

We identified an issue in the Amazon ECS agent where, under certain conditions, an introspection server could be accessed off-host by another instance if the instances are in the same security group or if their security groups allow incoming connections that include the port where the server is hosted. This issue does not affect instances where the option to allow off-host access to the introspection server is set to 'false'.

This issue has been addressed in ECS agent version 1.97.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.

If customers cannot update to the latest AMI, they can modify the Amazon EC2 security groups to restrict incoming access to the introspection server port (51678).

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	AMZN
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	AMZN

Weaknesses

CWE-277 Insecure Inherited Permissions, CWE-648: Incorrect Use of Privileged APIs

Affected Products

Product	Versions
ECSAmazon	0.0.3 to before 1.97.1Affected

References

https://github.com/aws/amazon-ecs-agent/releases/tag/v1.97.1patch
https://aws.amazon.com/security/security-bulletins/AWS-2025-018/vendor-advisory
https://github.com/aws/amazon-ecs-agent/security/advisories/GHSA-wm7x-ww72-r77qvendor-advisory

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