[Security] Bump bottle from 0.12.16 to 0.12.19

[dependabot-preview]

Bumps bottle from 0.12.16 to 0.12.19.

Changelog

Sourced from bottle's changelog.

Commits

• 1522198 Release of 0.12.19
• 57a2f22 Do not split query strings on ; anymore.
• 2d6acef Fix the Allow: header value in 405 "Method not allowed." response.
• 44b9cf8 Fix release steps in makefile
• 1d531f7 Release of 0.12.18
• 6927a6b Update build steps in makefile
• 774e1c7 fix #1181: digestmod parameter is now required since Python 3.8
• ce00d54 Fix: Two import-level DeprecationWarnings in 3.8
• bdbab79 fix #1181: digestmod parameter is now required since Python 3.8
• 099c4a2 #1177 Bug fix of missing regex escaped back slashes
• Additional commits viewable in compare view

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[dependabot-preview]

We've just been alerted that this update fixes a security vulnerability:

Sourced from The GitHub Security Advisory Database.

HTTP Request smuggling in bottle

The package bottle before 0.12.19 are vulnerable to Web Cache Poisoning by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.

Affected versions: ["< 0.12.19"]