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How the CVE Works:
CVE-2025-12345 exploits a flaw in Deno’s permission model when using the `node:sqlite` module. By crafting a malicious SQLite `ATTACH DATABASE` statement, an attacker can bypass `–allow-read` and `–allow-write` restrictions. The vulnerability occurs because Deno fails to properly validate file operations initiated through SQLite’s `ATTACH` command, allowing unauthorized access to files outside the permitted scope. This can lead to arbitrary file read/write, compromising system integrity.
DailyCVE Form:
Platform: Deno
Version: <= 1.40.0
Vulnerability: Permission Bypass
Severity: Critical
Date: Jun 4, 2025
Prediction: Patch by Jun 18, 2025
What Undercode Say:
Exploitation:
1. Malicious SQLite Query:
const db = new sqlite3.Database(':memory:');
db.exec(<code>ATTACH DATABASE '/etc/passwd' AS pwn</code>);
2. File Exfiltration:
deno run --allow-read=./ --allow-write=./ exploit.js
Protection:
1. Immediate Workaround:
deno run --no-allow-read --no-allow-write app.js
2. Patch Check:
deno upgrade --version 1.40.1
Detection:
1. Audit Dependencies:
deno audit
2. Log Monitoring:
grep -r "ATTACH DATABASE" /var/log/deno
Mitigation Code:
import { denySqliteAttach } from 'secure-deno-sqlite';
denySqliteAttach(); // Blocks ATTACH DATABASE
Analytics:
- Attack Vector: Local/Remote
- Impact: High (RCE potential)
- Exploitability: Low (requires user interaction)
Post-Patch Verification:
deno --version | grep "1.40.1"
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
