[Snyk] Security upgrade alpine from 3.14.2 to 3.20.3

[ekmixon]

Snyk has created this PR to fix 5 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):

• Dockerfile

We recommend upgrading to alpine:3.20.3, as this image has only 1 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-ALPINE314-ZLIB-2976174	714
	Loop with Unreachable Exit Condition ('Infinite Loop') SNYK-ALPINE314-OPENSSL-2426333	614
	Access of Resource Using Incompatible Type ('Type Confusion') SNYK-ALPINE314-OPENSSL-3314646	614
	Double Free SNYK-ALPINE314-OPENSSL-3314653	614
	Improper Certificate Validation SNYK-ALPINE314-OPENSSL-3368739	614

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• Check the changes in this PR to ensure they won't cause issues with your project.
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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Access of Resource Using Incompatible Type ('Type Confusion')
🦉 Double Free

Summary by Sourcery

Bug Fixes:

• Upgrade Alpine base image in Dockerfile from version 3.14.2 to 3.20.3 to address multiple security vulnerabilities.

[secure-code-warrior-for-github]

Micro-Learning Topic: Double free (Detected by phrase)

Matched on "Double Free"

What is this? (2min video)

Double free errors occur when free() is called more than once with the same memory address as an argument.

Try a challenge in Secure Code Warrior

Micro-Learning Topic: Type confusion (Detected by phrase)

Matched on "Type Confusion"

What is this? (2min video)

When attackers are able to manipulate the memory reserved for objects directly, they can then pass a reference to a crafted block of memory to be used in the place of a valid object type. This triggers the run time engine to execute arbitrary code which is under the control of the attacker due to the induced type confusion.

Try a challenge in Secure Code Warrior

[sourcery-ai]

Reviewer's Guide by Sourcery

This security-focused PR upgrades the Alpine Linux base image from version 3.14.2 to 3.20.3 to address multiple high and critical severity vulnerabilities in the Docker image dependencies. The change is implemented through a simple version update in the Dockerfile's FROM instruction.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Update Alpine Linux base image to patch security vulnerabilities	Upgrade Alpine version from 3.14.2 to 3.20.3 Fix critical severity out-of-bounds write vulnerability in zlib Address four high severity OpenSSL vulnerabilities including infinite loop, type confusion, double free, and improper certificate validation issues	Dockerfile

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[sourcery-ai]

We have skipped reviewing this pull request. Here's why:

• It seems to have been created by a bot ('[Snyk]' found in title). We assume it knows what it's doing!
• We don't review packaging changes - Let us know if you'd like us to change this.