Vulnerability · Published Aug 14, 2025 · Assigned by AMZN
CVE-2025-9039Information Disclosure in Amazon ECS Container Agent
Medium 4.3
In plain English
A medium-severity security flaw in ECS from Amazon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/aws/amazon-ecs-agent | 1.97.1 | GHSA-wm7x-ww72-r77q |
| Go | github.com/aws/amazon-ecs-agent | 1.97.1 | GO-2025-3891 |
Affected products (as reported)
Weakness: CWE-277 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N