Babel vulnerable to arbitrary code execution when compiling specifically crafted malicious code

[yuhui]

Expected Behaviour

@babel/traverse v7.23.2 or higher is used.

Actual Behaviour

@babel/traverse v7.15.4 is used in package.json.

reactor-sandbox/package.json

Line 55 in 4d7e0c0

"@babel/traverse": "^7.15.4",

More information

I received this Github dependabot alert in my repository for my Launch extension:

Impact

Using Babel to compile code that was specifically crafted by an attacker can lead to arbitrary code execution during compilation, when using plugins that rely on the path.evaluate() or path.evaluateTruthy() internal Babel methods.

Known affected plugins are:

• @babel/plugin-transform-runtime
• @babel/preset-env when using its useBuiltIns option
• Any "polyfill provider" plugin that depends on @babel/helper-define-polyfill-provider, such as babel-plugin-polyfill-corejs3, babel-plugin-polyfill-corejs2, babel-plugin-polyfill-es-shims, babel-plugin-polyfill-regenerator
• No other plugins under the @babel/ namespace are impacted, but third-party plugins might be.

Users that only compile trusted code are not impacted.

Patches

The vulnerability has been fixed in @babel/[email protected].

Babel 6 does not receive security fixes anymore (see Babel's security policy), hence there is no patch planned for babel-traverse@6.

Workarounds

• Upgrade @babel/traverse to v7.23.2 or higher. You can do this by deleting it from your package manager's lockfile and re-installing the dependencies. @babel/core >=7.23.2 will automatically pull in a non-vulnerable version.
• If you cannot upgrade @babel/traverse and are using one of the affected packages mentioned above, upgrade them to their latest version to avoid triggering the vulnerable code path in affected @babel/traverse versions:
  • @babel/plugin-transform-runtime v7.23.2
  • @babel/preset-env v7.23.2
  • @babel/helper-define-polyfill-provider v0.4.3
  • babel-plugin-polyfill-corejs2 v0.4.6
  • babel-plugin-polyfill-corejs3 v0.8.5
  • babel-plugin-polyfill-es-shims v0.10.0
  • babel-plugin-polyfill-regenerator v0.5.3

[brenthosie]

@adobe export issue to Jira project PDCL as Story

[github-jira-sync-bot]

✅ Jira issue PDCL-11715 is successfully created for this GitHub issue.

[brenthosie]

@yuhui will you try installing @adobe/reactor-sandbox@next and let me know if that meets the need? I'm personally testing with this version as well with an extension I'm developing for an edge extension.

[yuhui]

@brenthosie @adobe/reactor-sandbox@next seems to work properly for me. I did not run into any problems when running the sandbox locally in various projects.