[Snyk] Security upgrade nginx from 1.19.3-alpine to 1.25.2-alpine

[ekmixon]

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

• devenv/docker/blocks/prometheus_basic_auth_proxy/Dockerfile

We recommend upgrading to nginx:1.25.2-alpine, as this image has only 5 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	Out-of-bounds Read SNYK-ALPINE312-APKTOOLS-1533753	No Known Exploit
	714	Double Free SNYK-ALPINE312-CURL-1585256	No Known Exploit
	714	Out-of-bounds Write SNYK-ALPINE312-FREETYPE-2809179	No Known Exploit
	714	Buffer Overflow SNYK-ALPINE312-OPENSSL-1569452	No Known Exploit
	714	Out-of-bounds Write SNYK-ALPINE312-ZLIB-2977082	No Known Exploit

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[secure-code-warrior-for-github]

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: 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.

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[guardrails]

⚠️ We detected 1 security issue in this pull request:

Insecure Access Control (1)

Severity	Details	Docs
High	Title: Missing User Instruction grafana/devenv/docker/blocks/prometheus_basic_auth_proxy/Dockerfile Line 1 in 893f600 FROM nginx:1.25.2-alpine	📚

More info on how to fix Insecure Access Control in Dockerfile.

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[secure-code-warrior-for-github]

Micro-Learning Topic: Insufficient access control (Detected by phrase)

Matched on "Insecure Access Control"

Restrictions on what authenticated users are allowed to do are often not properly enforced. Attackers can exploit these flaws to access unauthorized functionality and/or data, such as access other users' accounts, view sensitive files, modify other users’ data, change access rights, etc. Source: https://www.owasp.org/index.php/Category:OWASP_Top_Ten_Project

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