Typora License Validation Bypass (Public Disclosure – CVE Pending) скачать в хорошем качестве

Typora License Validation Bypass (Public Disclosure – CVE Pending)

Typora License Validation Bypass (Public Disclosure – CVE Pending) CVE Request 1891916 for CVE ID This video demonstrates a security vulnerability in Typora's license enforcement logic. The issue was responsibly disclosed to the vendor with no corrective action taken. This video is part of a Coordinated Vulnerability Disclosure process. No illegal activity is demonstrated or encouraged. Security Issue: Typora License Bypass via Client-Side JavaScript Tampering (Public Disclosure) Affected Version: Typora for Windows x64, verified on `v1.10.8.0`. Earlier versions may also be affected. Summary Typora’s license validation mechanism is implemented entirely in client-side JavaScript. A trivial modification to a single line in `LicenseIndex.*.chunk.js` allows full and persistent bypass of the license enforcement logic, enabling unauthorized users to activate the application without a valid key. Technical Details Original (intended validation logic): ```js e.hasActivated = "true" == e.hasActivated; ``` Tampered (patched logic): ```js e.hasActivated = "true" == "true"; ``` With this change, Typora permanently considers the user "Registered", despite the absence of a valid license key. The tampered state survives restarts and shows all UI elements consistent with a licensed copy. Additional Observations: No server-side validation or handshake occurs post-tampering. No integrity checks (hash, signature, etc.) are in place to detect or prevent such modification. License status logic resides entirely in a renderer-side `.js` file, not the Electron main process. Impact Bypass of all license enforcement Persistence across sessions Enables cracked distributions No runtime detection or mitigation Proof of Concept (PoC) Original video demonstration is available here: https://zerovectorcyberdefense.com/as... Recommendations 1.Move license validation to Electron’s main process, possibly in a compiled `.node` module. 2. Implement static integrity checks using SHA256 or similar to validate critical JS chunks at runtime. 3. Use JS obfuscation and rename sensitive variables in production builds (`webpack --mode production --minify --obfuscate`). 4. Add heuristic detection logic to scan for tampered content (e.g., string comparisons like `"true"=="true"`). 5. Optionally integrate backend-based validation** to confirm license authenticity (if not intended to be an offline-only tool). Timeline Responsible disclosure submitted: 06 Apr 2025 Follow-up attempts: 07 Jun 2025, 03 Jul 2025 No response received. This issue is now disclosed publicly in accordance with responsible vulnerability disclosure practices. Final Notes This report is made in good faith with the intent to strengthen the security and integrity of Typora’s licensing model. Developers and commercial vendors are encouraged to treat licensing mechanisms as part of the security surface - particularly when transitioning to paid models. If a private discussion is desired, I remain open to dialogue and clarification via secure contact channels listed on my professional profile. Respectfully, Kaotick Jay Cybersecurity Researcher & Red Team Penetration Tester https://zerovectorcyberdefense.com For more content from me: Amazon Author Page: https://www.amazon.com/stores/Kaotick... My published books on Amazon: Online Anonymity: Privacy, OPSEC, and the Art of Being Invisible: https://www.amazon.com/Online-Anonymi... Red Team Manual - Linux Systems: https://www.amazon.com/Red-Team-Manua... Find me on: Github: github.com/kaotickj HTB (hacker rank): https://app.hackthebox.com/profile/47... TryHackMe Top 1% (Rank: 4623): https://tryhackme.com/p/kaotickj LinkedIn: / johnny-watts-695751125 Company Website: https://kdgwebsolutions.com Patreon: / kaotickjay