[Snyk] Security upgrade python from 3.7-slim to 3.8.18-slim

[mikolajroszak]

This PR was automatically created by Snyk using the credentials of a real user.

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

Changes included in this PR

• docker/Dockerfile.python-3

We recommend upgrading to python:3.8.18-slim, as this image has only 35 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	686	Out-of-bounds Write SNYK-DEBIAN12-GLIBC-5927132	No Known Exploit
	686	Out-of-bounds Write SNYK-DEBIAN12-GLIBC-5927132	No Known Exploit
	514	Improper Authentication SNYK-DEBIAN12-OPENSSL-5776700	No Known Exploit
	514	Inefficient Regular Expression Complexity SNYK-DEBIAN12-OPENSSL-5788322	No Known Exploit
	514	Excessive Iteration SNYK-DEBIAN12-OPENSSL-5812633	No Known Exploit

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[secure-code-warrior-for-github]

Micro-Learning Topic: Insecure authentication (Detected by phrase)

Matched on "Improper Authentication"

What is this? (2min video)

Improper authentication happens when mechanisms intended to identify the user are flawed (easily tamperable or insufficient). This would allow an attacker to bypass access controls or to easily impersonate a user.

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Helpful references

• OWASP Improper Authentication prevention cheat sheet - This article is focused on providing clear, simple, actionable guidance for preventing improper authentication flaws in your applications.

Micro-Learning Topic: Inefficient regular expression (Detected by phrase)

Matched on "Inefficient Regular Expression"

What is this? (2min video)

A regular expression that requires exponential time to match certain inputs can be a performance bottleneck, and may be vulnerable to denial-of-service attacks.

Try a challenge in Secure Code Warrior