Update dependency highlight.js to v10.4.1 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
highlight.js (source)	10.1.1 → 10.4.1

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Prototype Pollution in highlight.js

CVE-2020-26237 / GHSA-vfrc-7r7c-w9mx

More information

Details

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) {
  // ...
  var languages = Object.create(null);
  var aliases = Object.create(null);

Filter out bad data from end users:

Filter the language names that users are allowed to inject into your HTML to guarantee they are valid.

References

• What is Prototype Pollution?
• https://github.com/highlightjs/highlight.js/pull/2636

For more information

If you have any questions or comments about this advisory:

• Please file an issue against highlight.js

Severity

• CVSS Score: 5.8 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N

References

• https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx
• https://github.com/highlightjs/highlight.js/pull/2636
• https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0
• https://www.npmjs.com/package/highlight.js
• https://nvd.nist.gov/vuln/detail/CVE-2020-26237
• https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html
• https://www.oracle.com/security-alerts/cpujul2022.html
• https://github.com/advisories/GHSA-vfrc-7r7c-w9mx

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

ReDOS vulnerabities: multiple grammars

GHSA-7wwv-vh3v-89cq

More information

Details

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. Exponential grammars (C, Perl, JavaScript) are auto-registered when using the common grammar subset/library require('highlight.js/lib/common') as of 10.4.0 - see https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.4.0/build/highlight.js

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
• erlang-repl
• powershell
• routeros
• livescript (10.4.0 and 9.18.5 included this fix)
• javascript & typescript (10.4.0 included partial fixes)

And of course any aliases of those languages have the same issue. ie: hpp is no safer than cpp.

Grammars with polynomial backtracking issues:

• kotlin
• gcode
• d
• aspectj
• moonscript
• coffeescript/livescript
• csharp
• scilab
• crystal
• elixir
• basic
• ebnf
• ruby
• fortran/irpf90
• livecodeserver
• yaml
• x86asm
• dsconfig
• markdown
• ruleslanguage
• xquery
• sqf

And again: any aliases of those languages have the same issue. ie: ruby and rb share the same ruby issues.

Patches

• Version 10.4.1 resolves these vulnerabilities. Please upgrade.

Workarounds / Mitigations

• Discontinue use the affected grammars. (or perhaps use only those with poly vs exponential issues)
• Attempt cherry-picking the grammar fixes into older versions...
• Attempt using newer CDN versions of any affected languages. (ie using an older CDN version of the library with newer CDN grammars). Your mileage may vary.

References

• https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS

For more information

If you have any questions or comments about this advisory:

• Open an issue: https://github.com/highlightjs/highlight.js/issues
• Email us at security@highlightjs.com

Severity

Medium

References

• https://github.com/highlightjs/highlight.js/security/advisories/GHSA-7wwv-vh3v-89cq
• https://github.com/highlightjs/highlight.js/commit/373b9d862401162e832ce77305e49b859e110f9c
• https://www.npmjs.com/package/@​highlightjs/cdn-assets
• https://www.npmjs.com/package/highlight.js
• https://github.com/advisories/GHSA-7wwv-vh3v-89cq

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

Release Notes

highlightjs/highlight.js (highlight.js)

v10.4.1

Compare Source

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.

v10.4.0

Compare Source

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

Deprecations:

• (chore) requireLanguage is deprecated.
  • Prefer getLanguage (with custom error handling) or built-time dependencies.
  • See Library API for more information.

Parser:

• enh(parser) use negative look-ahead for beginKeywords support (#​2813) Josh Goebel
• enh(grammars) allow classNameAliases for more complex grammars Josh Goebel
• fix(vue): Language name now appears in CSS class (#​2807) Michael Rush
• (chore) Clean up all regexs to be UTF-8 compliant/ready (#​2759) Josh Goebel
• enh(grammars) allow classNameAliases for more complex grammars Josh Goebel

New Languages:

• Added 3rd party Chapel grammar to SUPPORTED_LANGUAGES (#​2806) Brad Chamberlain
• Added BBCode grammar to SUPPORTED_LANGUAGES (#​2867) Paul Reid
• enh(javascript) Added node-repl for Node.js REPL sessions (#​2792) Marat Nagayev

Language Improvements:

• enh(shell) Recognize prompts which contain tilde ~ (#​2859) Guillaume Grossetie
• enh(shell) Add support for multiline commands with line continuation \ (#​2861) Guillaume Grossetie
• enh(autodetect) Over 30+ improvements to auto-detect (#​2745) Josh Goebel
  • 4-5% improvement in auto-detect against large sample set
  • properties, angelscript, lsl, javascript, n1ql, ocaml, ruby
  • protobuf, hy, scheme, crystal, yaml, r, vbscript, groovy
  • python, java, php, lisp, matlab, clojure, csharp, css
• fix(r) fixed keywords not properly spaced (#​2852) Josh Goebel
• fix(javascript) fix potential catastrophic backtracking (#​2852) Josh Goebel
• fix(livescript) fix potential catastrophic backtracking (#​2852) Josh Goebel
• bug(xml) XML grammar was far too imprecise/fuzzy Josh Goebel
• enh(xml) Improve precision to prevent false auto-detect positives Josh Goebel
• fix(js/ts) Prevent for/while/if/switch from falsly matching as functions (#​2803) Josh Goebel
• enh(julia) Update keyword lists for Julia 1.x (#​2781) Fredrik Ekre
• enh(python) Match numeric literals per the language reference Richard Gibson
• enh(ruby) Match numeric literals per language documentation Richard Gibson
• enh(javascript) Match numeric literals per ECMA-262 spec Richard Gibson
• enh(java) Match numeric literals per Java Language Specification Richard Gibson
• enh(swift) Match numeric literals per language reference Richard Gibson
• enh(php) highlight variables (#​2785) Taufik Nurrohman
• fix(python) Handle comments on decorators (#​2804) Jonathan Sharpe
• enh(diff) improve highlighting of diff for git patches [Florian Bezdeka][]
• fix(llvm) lots of small improvements and fixes (#​2830) Josh Goebel
• enh(mathematica) Rework entire implementation Patrick Scheibe
  • Correct matching of the many variations of Mathematica's numbers
  • Matching of named-characters aka special symbols like \[Gamma]
  • Updated list of version 12.1 built-in symbols
  • Matching of patterns, slots, message-names and braces
• fix(swift) Handle keywords that start with # Marcus Ortiz
• enh(swift) Match some keyword Marcus Ortiz
• enh(swift) Match @main attribute Marcus Ortiz

Dev Improvements:

• chore(dev) add theme picker to the tools/developer tool (#​2770) Josh Goebel
• fix(dev) the Vue.js plugin no longer throws an exception when hljs is not in the global namespace Kyle Brown

New themes:

• StackOverflow Dark by Jan Pilzer
• StackOverflow Light by Jan Pilzer

v10.3.2: - Oops, "Javascript".

Compare Source

Tiny tiny release, just to fix the website incorrectly not listing Javascript
in the list of languages you could choose for a custom build. NPM and CDN
build should not have been affected so 10.3.1 is effectively the same as
10.3.2 for those builds.

If you made a custom build from the website with 10.3 or 10.3.1 you may
want to check and make sure it includes Javascript, and if not, build it again.

v10.3.1

Compare Source

Prior version let some look-behind regex sneak in, which does not work
yet on Safari. This release removes those incompatible regexes.

Fix:

• fix(Safari) Remove currently unsupported look-behind regex (fix) Josh Goebel

v10.3.0

Compare Source

Language Improvements:

• enh(latex) Complete ground up rewrite of LaTex grammar schtandard
• fix(cpp) implement backslash line continuation in comments (#​2757) Konrad Rudolph
• fix(cpp) improve parsing issues with templates (#​2752) [Josh Goebel][]
• enh(cpp) add support for enum (struct|class) and union (#​2752) [Josh Goebel][]
• fix(js/ts) Fix nesting of {} inside template literals SUBST expression (#​2748) [Josh Goebel][]
• enh(js/ts) Highlight class methods as functions (#​2727) [Josh Goebel][]
• fix(js/ts) constructor is now highlighted as a function title (not keyword) (#​2727) [Josh Goebel][]
• fix(c-like) preprocessor directives not detected after else (#​2738) [Josh Goebel][]
• enh(javascript) allow # for private class fields (#​2701) Chris Krycho
• fix(js) prevent runaway regex (#​2746) [Josh Goebel][]
• fix(bash) enh(bash) allow nested params (#​2731) [Josh Goebel][]
• fix(python) Fix highlighting of keywords and strings (#​2713, #​2715) Konrad Rudolph
• fix(fsharp) Prevent (*) from being detected as a multi-line comment [Josh Goebel][]
• enh(bash) add support for heredocs (#​2684) [Josh Goebel][]
• enh(r) major overhaul of the R language grammar (and fix a few bugs) (#​2680) Konrad Rudolph
• enh(csharp) Add all C# 9 keywords, and other missing keywords (#​2679) David Pine
• enh(objectivec) Add objective-c++ and obj-c++ aliases for Objective-C [Josh Goebel][]
• enh(java) Add support for record (#​2685) [Josh Goebel][]
• fix(csharp) prevent modifier keywords wrongly flagged as title (#​2683) [Josh Goebel][]
• enh(axapta) Update keyword list for Axapta (X++) (#​2686) Ryan Jonasson
• fix(fortran) FORTRAN 77-style comments (#​2677) Philipp Engel
• fix(javascript) Comments inside params should be highlighted (#​2702) [Josh Goebel][]
• fix(scala) Comments inside class header should be highlighted (#​1559) [Josh Goebel][]
• fix(c-like) Correctly highlight modifiers (final) in class declaration (#​2696) [Josh Goebel][]
• enh(angelscript) Improve heredocs, numbers, metadata blocks (#​2724) Melissa Geels
• enh(javascript) Implement Numeric Separators (#​2617) Antoine du Hamel
• enh(typescript) TypeScript also gains support for numeric separators (#​2617) Antoine du Hamel
• enh(php) Add support for PHP 8 match keyword and add php8 as an alias (#​2733) Ayesh Karunaratne
• fix(handlebars) Support if else keyboards (#​2659) Tom Wallace

Deprecations:

• useBR option deprecated and will be removed in v11.0. (#​2559) [Josh Goebel][]

v10.2.1

Compare Source

Parser Engine:

• fix(parser) complete fix for resuming matches from same index (#​2678) Josh Goebel

v10.2.0

Compare Source

Parser Engine:

• (fix) When ignoring a potential match highlighting can terminate early (#​2649) Josh Goebel

New themes:

• Gradient Light by Samia Ali

Deprecations:

• fixMarkup is now deprecated and will be removed in v11.0. (#​2534) Josh Goebel

Big picture:

• Add simple Vue plugin for basic use cases (#​2544) Josh Goebel

Language Improvements:

• fix(bash) Fewer false positives for keywords in arguments (#​2669) sirosen
• fix(js) Prevent long series of /////// from causing freezes (#​2656) Josh Goebel
• enh(csharp) Add init and record keywords for C# 9.0 (#​2660) Youssef Victor
• enh(matlab) Add new R2019b arguments keyword and fix enumeration keyword (#​2619) Andrew Janke
• fix(kotlin) Remove very old keywords and update example code (#​2623) kageru
• fix(night) Prevent object prototypes method values from being returned in getLanguage (#​2636) night
• enh(java) Add support for enum, which will identify as a class now (#​2643) ezksd
• enh(nsis) Add support for NSIS 3.06 commands (#​2653) idleberg
• enh(php) detect newer more flexible HEREdoc syntax (#​2658) eytienne

v10.1.2

Compare Source

Fixes:

• fix(night) Prevent object prototype values from being returned by getLanguage (#​2636) night

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