[Snyk] Security upgrade alpine from 3.7 to 3.23.2

[Dustin4444]

Snyk has created this PR to fix 1 vulnerabilities in the dockerfile dependencies of this project.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Snyk changed the following file(s):

• libnetwork/cmd/ssd/Dockerfile

We recommend upgrading to alpine:3.23.2, as this image has only 0 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Out-of-bounds Write SNYK-ALPINE37-MUSL-458286	240
	Out-of-bounds Write SNYK-ALPINE37-MUSL-458286	240

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• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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🦉 Out-of-bounds Write

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[gemini-code-assist]

Summary of Changes

Hello @Dustin4444, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on bolstering the project's security by updating a core Docker base image. By moving to a more recent and secure version of Alpine Linux, the change effectively mitigates identified critical vulnerabilities, thereby reducing potential security risks and ensuring the application runs on a hardened foundation.

Highlights

• Security Upgrade: This pull request, automatically generated by Snyk, upgrades the alpine base image in libnetwork/cmd/ssd/Dockerfile from version 3.7 to 3.23.2.
• Vulnerability Fix: The upgrade addresses and fixes 1 critical 'Out-of-bounds Write' vulnerability (SNYK-ALPINE37-MUSL-458286) with a score of 240, which was present in the older alpine:3.7 image.
• Improved Security Posture: The new alpine:3.23.2 base image has 0 known vulnerabilities, significantly enhancing the security of the Docker build.

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[gemini-code-assist]

Code Review

This pull request, automatically generated by Snyk, aims to upgrade the Alpine base image to fix a security vulnerability. However, the suggested version alpine:3.23.2 is invalid and will break the build. Additionally, the Dockerfile depends on Python 2, which is not available in Alpine versions newer than 3.15. A more appropriate fix would be to upgrade to alpine:3.15, which resolves the vulnerability while retaining Python 2 support. I have added a comment with a suggestion to correct the base image version.

[gemini-code-assist]

The proposed Alpine version 3.23.2 is not a valid Alpine release. This will cause the Docker build to fail as it won't be able to find the base image.

Furthermore, this Dockerfile relies on python2, which has been removed from Alpine repositories since version 3.16. Upgrading to any recent version of Alpine (like 3.16 or newer) will break the build because the python2 package cannot be installed. The script ssd.py in this directory is written for Python 2.

The last major Alpine version that includes python2 is 3.15. To fix the security vulnerability while maintaining Python 2 compatibility, I suggest using alpine:3.15.

FROM alpine:3.15