[Snyk] Security upgrade python from 3.6-slim to 3.8-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-3.6

We recommend upgrading to python:3.8-slim, as this image has only 33 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
	714	Directory Traversal SNYK-DEBIAN11-DPKG-2847942	No Known Exploit
	714	Out-of-bounds Read SNYK-DEBIAN11-LIBTASN16-3061097	No Known Exploit
	714	OS Command Injection SNYK-DEBIAN11-OPENSSL-2807596	No Known Exploit
	714	OS Command Injection SNYK-DEBIAN11-OPENSSL-2933518	No Known Exploit
	614	Allocation of Resources Without Limits or Throttling SNYK-DEBIAN11-OPENSSL-5661566	No Known Exploit

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Directory Traversal
🦉 Allocation of Resources Without Limits or Throttling

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[secure-code-warrior-for-github]

Micro-Learning Topic: OS command injection (Detected by phrase)

Matched on "OS Command Injection"

What is this? (2min video)

In many situations, applications will rely on OS provided functions, scripts, macros and utilities instead of reimplementing them in code. While functions would typically be accessed through a native interface library, the remaining three OS provided features will normally be invoked via the command line or launched as a process. If unsafe inputs are used to construct commands or arguments, it may allow arbitrary OS operations to be performed that can compromise the server.

Try a challenge in Secure Code Warrior

Helpful references

• OWASP Command Injection - OWASP community page with comprehensive information about command injection, and links to various OWASP resources to help detect or prevent it.
• OWASP testing for Command Injection - This article is focused on providing testing techniques for identifying command injection flaws in your applications

Micro-Learning Topic: Directory traversal (Detected by phrase)

Matched on "Directory Traversal"

What is this? (2min video)

Path traversal vulnerabilities occur when inputs that have not been sufficiently validated or sanitised are used to build directory or file paths. If an attacker can influence the path being accessed by the server, they may be able to gain unauthorised access to files or even execute arbitrary code on the server (when coupled with file upload functionality).

Try a challenge in Secure Code Warrior

Helpful references

• OWASP Input Validation Cheat Sheet - This cheatsheet is focused on providing clear, simple, actionable guidance for preventing injection and input validation flaws in your applications, including defence against path traversal.
• OWASP Path Traversal - OWASP community page with comprehensive information about path traversal, and links to various OWASP resources to help detect or prevent it.