⬆️🔒 Bump highlight.js from 9.15.10 to 10.4.1

[dependabot-preview]

Bumps highlight.js from 9.15.10 to 10.4.1. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

ReDOS vulnerabities: multiple grammars

Impact: Potential ReDOS vulnerabilities (exponential and polynomial RegEx backtracking)

oswasp:

> The Regular expression Denial of Service (ReDoS) is a Denial of Service attack, that exploits the fact that most Regular Expression implementations may reach extreme situations that cause them to work very slowly (exponentially related to input size). An attacker can then cause a program using a Regular Expression to enter these extreme situations and then hang for a very long time.

If are you are using Highlight.js to highlight user-provided data you are possibly vulnerable. On the client-side (in a browser or Electron environment) risks could include lengthy freezes or crashes... On the server-side infinite freezes could occur... effectively preventing users from accessing your app or service (ie, Denial of Service).

This is an issue with grammars shipped with the parser (and potentially 3rd party grammars also), not the parser itself. If you are using Highlight.js with any of the following grammars you are vulnerable. If you are using highlightAuto to detect the language (and have any of these grammars registered) you are vulnerable.

All versions prior to 10.4.1 are vulnerable, including version 9.18.5.

Grammars with exponential backtracking issues:

• c-like (c, cpp, arduino)
• handlebars (htmlbars)
• gams
• perl
• jboss-cli
• r

Affected versions: >= 9.0.0 < 10.4.1

Sourced from The GitHub Security Advisory Database.

Prototype Pollution in highlight.js

Impact

Affected versions of this package are vulnerable to Prototype Pollution. A malicious HTML code block can be crafted that will result in prototype pollution of the base object's prototype during highlighting. If you allow users to insert custom HTML code blocks into your page/app via parsing Markdown code blocks (or similar) and do not filter the language names the user can provide you may be vulnerable.

The pollution should just be harmless data but this can cause problems for applications not expecting these properties to exist and can result in strange behavior or application crashes, i.e. a potential DOS vector.

If your website or application does not render user provided data it should be unaffected.

Patches

Versions 9.18.2 and 10.1.2 and newer include fixes for this vulnerability. If you are using version 7 or 8 you are encouraged to upgrade to a newer release.

Workarounds

Patch your library

Manually patch your library to create null objects for both languages and aliases:

const HLJS = function(hljs) {
</tr></table> ... (truncated)
Affected versions: < 9.18.2

Release notes

Sourced from highlight.js's releases.

10.4.1

Security fixes:

• (fix) Exponential backtracking fixes for: Josh Goebel
  • cpp
  • handlebars
  • gams
  • perl
  • jboss-cli
  • r
  • erlang-repl
  • powershell
  • routeros
• (fix) Polynomial backtracking fixes for: Josh Goebel
  • asciidoc
  • reasonml
  • latex
  • kotlin
  • gcode
  • d
  • aspectj
  • moonscript
  • coffeescript/livescript
  • csharp
  • scilab
  • crystal
  • elixir
  • basic
  • ebnf
  • ruby
  • fortran/irpf90
  • livecodeserver
  • yaml
  • x86asm
  • dsconfig
  • markdown
  • ruleslanguage
  • xquery
  • sqf

Very grateful to Michael Schmidt for all the help.

10.4.0 - November 2020

A largish release with many improvements and fixes from quite a few different contributors. Enjoy!

Deprecations:

Changelog

Sourced from highlight.js's changelog.

Version 10.4.1 (tentative)

Security

• (fix) Exponential backtracking fixes for: Josh Goebel
  • cpp
  • handlebars
  • gams
  • perl
  • jboss-cli
  • r
  • erlang-repl
  • powershell
  • routeros
• (fix) Polynomial backtracking fixes for: Josh Goebel
  • asciidoc
  • reasonml
  • latex
  • kotlin
  • gcode
  • d
  • aspectj
  • moonscript
  • coffeescript/livescript
  • csharp
  • scilab
  • crystal
  • elixir
  • basic
  • ebnf
  • ruby
  • fortran/irpf90
  • livecodeserver
  • yaml
  • x86asm
  • dsconfig
  • markdown
  • ruleslanguage
  • xquery
  • sqf

Very grateful to Michael Schmidt for all the help.

Version 10.4.0

A largish release with many improvements and fixes from quite a few different contributors. Enjoy!

Commits

• e96b915 bump 10.4.1
• 065f65f chore(release) allow release script to handle production releases
• 68509fc chore(docs) bump SECURITY mention to 9.18.5
• aa0fb85 chore(docs) Version 9 has reached EOL.
• fb0a626 enh(ci): Add tests for polynomial regex issues
• fa46dd1 fix(reasonml) fix poly backtracking issue
• d496052 fix(latex) fix poly backtracking issue
• d9f1cdb fix(javascript/typescript) fix poly backtracking issue
• fdec037 fix(asciidoc) fix poly backtracking issue
• 02ca487 fix(kotlin) fix poly backtracking issue
• Additional commits viewable in compare view

Maintainer changes

This version was pushed to npm by joshgoebel, a new releaser for highlight.js since your current version.

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