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harden: external resources are fetched from github over... in pre.js - #54

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anupamme:fix-repo-lo-v-001-fetch-integrity-verification
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harden: external resources are fetched from github over... in pre.js#54
anupamme wants to merge 1 commit into
just-js:mainfrom
anupamme:fix-repo-lo-v-001-fetch-integrity-verification

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Summary

Harden input handling in bindings/pre.js (flagged by multi_agent_ai).

Vulnerability

Field Value
ID V-001
Severity HIGH
Scanner multi_agent_ai
Rule V-001
File bindings/pre.js:3
Assessment Defensive hardening
Chain Complexity 2-step

Description: External resources are fetched from GitHub over HTTPS and written directly to the filesystem without any integrity verification (no checksum, no signature validation). The URL in bindings/pre.js is partially constructed from process.versions.v8, and the fetched content is written directly as a C header file. In lib/zlib/build.js, a tarball is fetched and extracted without hash verification. If the upstream source is compromised (e.g., GitHub account takeover, CDN compromise), malicious code would be incorporated into the build.

Threat Model Context

This is a local CLI tool - exploitation requires the attacker to control command-line arguments or input files.

Changes

  • bindings/pre.js

Behavior Preservation

The change is scoped to 1 file on the vulnerable path; it only tightens handling of untrusted input and leaves valid inputs unaffected.


This patch removes an exploit primitive — a code pattern that, while not independently exploitable today, could be chained with other weaknesses by automated exploit-development tooling. Proactive removal of such primitives raises the bar against increasingly capable automated attack tools.


Automated security fix by OrbisAI Security

Automated security fix generated by OrbisAI Security
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