[google-labs-jules]

🛡️ Sentinel Security Report

• 🚨 Severity: MEDIUM (Denial of Service / Resource Exhaustion)
• 💡 Vulnerability: Unbounded stream decompression when reading info.json archive entries from mod zip files (entry.read_to_string(&mut s)).
• 🎯 Impact: An untrusted or maliciously crafted mod zip (hosted on a mirror or placed in the mods directory) containing a zip bomb could decompress gigabytes of repetitive data into memory, causing an Out-Of-Memory (OOM) process crash and denial of service for the desktop application.
• 🔧 Fix: Defined MAX_INFO_JSON_BYTES (2 MiB) in mod_store.rs. Capped decompression stream reads in both mod_store::read_info_json and downloader::verify_mod_zip_sync using .take(MAX_INFO_JSON_BYTES + 1), rejecting entries exceeding the limit with an explicit error.
• ✅ Verification:
  • Added unit test in mod_store verifying rejection of oversized/zip-bomb info.json entries without OOM.
  • Added unit test in downloader verifying rejection of oversized/zip-bomb info.json entries during download verification.
  • Executed all 143 cargo tests (cargo test --manifest-path src-tauri/Cargo.toml) and verified frontend build (pnpm build).
  • Documented learnings in .jules/sentinel.md.

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PR created automatically by Jules for task 2316590505834879537 started by @TheDragonSoft

[google-labs-jules]

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