[Snyk] Security upgrade tomcat from 9.0.40-jdk15-openjdk-slim to 9-jdk15-openjdk-slim

[JillThibodeau]

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

• Dockerfile

We recommend upgrading to tomcat:9-jdk15-openjdk-slim, as this image has only 98 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-DEBIAN10-DPKG-2847944	No Known Exploit
	714	Buffer Overflow SNYK-DEBIAN10-OPENSSL-1569403	No Known Exploit
	714	OS Command Injection SNYK-DEBIAN10-OPENSSL-2807585	No Known Exploit
	714	OS Command Injection SNYK-DEBIAN10-OPENSSL-2933515	No Known Exploit
	614	Integer Overflow or Wraparound SNYK-DEBIAN10-P11KIT-1050836	No Known Exploit

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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.

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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: Buffer overflow (Detected by phrase)

Matched on "Buffer Overflow"

What is this? (2min video)

A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold or when a program attempts to put data in a memory area past a buffer.

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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.

Micro-Learning Topic: Integer overflow (Detected by phrase)

Matched on "Integer Overflow"

What is this? (2min video)

Integer overflow occurs when the result of arithmetic operation is greater than the maximum value the integer data type can store.
For example, if an integer data type allows integers up to two bytes or 16 bits in length (or an unsigned number up to decimal 65,535), and two integers are to be added together that will exceed the value of 65,535, the result will be integer overflow.

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[github-advanced-security]

Snyk Container found more than 10 potential problems in the proposed changes. Check the Files changed tab for more details.