{“lastseen”:”2025-08-11T16:26:28″,”description”:”Titles: Microsoft Edge Renderer Process (Mojo IPC) 134.0.6998.177 – Sandbox Escape Author: nu11secur1ty Date: 08\/07\/2025 Vendor: Microsoft Software:…”,”published”:”2025-08-11T00:00:00″,”modified”:”2025-08-11T00:00:00″,”type”:”exploitdb”,”title”:”Microsoft Edge Renderer Process (Mojo IPC) 134.0.6998.177 – Sandbox Escape”,”source”:””,”references”:””,”id”:”EDB-ID:52403″,”bulletinFamily”:”exploit”,”cwe”:null,”cvelist”:[“CVE-2025-2783″,”CVE-2025-49730″],”sourceData”:”# Titles: Microsoft Edge Renderer Process (Mojo IPC) 134.0.6998.177 – Sandbox Escape\\r\\n# Author: nu11secur1ty\\r\\n# Date: 08\/07\/2025\\r\\n# Vendor: Microsoft\\r\\n# Software: https:\/\/www.microsoft.com\/en-us\/software-download\/windows11\\r\\n# Reference:\\r\\nhttps:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2025-49730\\r\\n# CVE-2025-2783\\r\\n\\r\\n## Description\\r\\n\\r\\nThis project contains a **proof-of-concept (PoC)** simulation for\\r\\n**CVE-2025-2783**, a sandbox escape and privilege escalation vulnerability\\r\\naffecting the Microsoft Mojo IPC subsystem on Windows 11 Pro.\\r\\nThe simulation demonstrates how a malicious renderer process could exploit\\r\\na crafted IPC message to escape sandbox restrictions and escalate\\r\\nprivileges, potentially leading to full system compromise.\\r\\n\\r\\n—\\r\\n\\r\\n## Disclaimer\\r\\n\\r\\n**This code is provided for educational and responsible disclosure purposes\\r\\nonly.**\\r\\nDo NOT use it for unauthorized testing or attacks on systems you do not own\\r\\nor have explicit permission to test.\\r\\n\\r\\nThe author(s) created this simulation in a controlled environment (virtual\\r\\nmachine) to safely demonstrate the vulnerability before reporting it to\\r\\nMicrosoft Security Response Center (MSRC).\\r\\n\\r\\n—\\r\\n\\r\\n## Components\\r\\n\\r\\n- `kur.py`: The main PoC Python script.\\r\\n It can run as either:\\r\\n – A phishing server hosting a malicious payload file\\r\\n – An exploit client that downloads the payload, simulates IPC\\r\\ncommunication, and triggers the sandbox escape.\\r\\n\\r\\n- `malicious_input.mojopipe`: The generated malicious payload JSON file\\r\\n(created at runtime).\\r\\n\\r\\n- `incident.log`: Log file recording actions and simulated system\\r\\ninformation captured during exploitation.\\r\\n\\r\\n—\\r\\n\\r\\n## Usage\\r\\n\\r\\n### Prerequisites\\r\\n\\r\\n- Python 3.7 or later on Windows 11 Pro (preferably in a VM for safety).\\r\\n- Administrator privileges recommended for full information output.\\r\\n\\r\\n### Steps\\r\\n\\r\\n1. **Start the phishing server** (in one terminal):\\r\\n “`bash\\r\\n python kur.py\\r\\n “`\\r\\n Enter choice: `1`\\r\\n This hosts the malicious payload file on `http:\/\/\\u003cyour_ip\\u003e:8080\/`.\\r\\n\\r\\n2. **Run the exploit client** (in another terminal on the same machine):\\r\\n “`bash\\r\\n python kur.py\\r\\n “`\\r\\n Enter choice: `2`\\r\\n This downloads the payload, simulates the IPC communication, and\\r\\nattempts sandbox escape.\\r\\n\\r\\n3. **Observe logs** in `incident.log` and console output for evidence of\\r\\nthe simulated exploit.\\r\\n\\r\\n—\\r\\n\\r\\n## Technical Details\\r\\n\\r\\n- The PoC simulates Mojo IPC message passing using Python’s\\r\\n`multiprocessing.connection` module.\\r\\n- The exploit payload contains a special handle value that triggers the\\r\\nsandbox escape simulation.\\r\\n- When triggered, the PoC logs user and system info to demonstrate\\r\\nprivilege escalation.\\r\\n- The phishing server serves the malicious payload to mimic real-world\\r\\nattack vector.\\r\\n\\r\\n—\\r\\n\\r\\n## Responsible Disclosure\\r\\n\\r\\nThis simulation was developed to responsibly disclose the vulnerability to\\r\\nMicrosoft Security Response Center (MSRC). Please coordinate with MSRC\\r\\nbefore any public release or use.\\r\\n\\r\\n# Video-demo:\\r\\n[href](https:\/\/www.youtube.com\/watch?v=MvwtRybi6ac)\\r\\n\\r\\n\\r\\n# Buy me a coffee if you are not ashamed:\\r\\n[href](https:\/\/www.paypal.com\/donate\/?hosted_button_id=ZPQZT5XMC5RFY)\\r\\n\\r\\n\\r\\n\\r\\n# Time spent:\\r\\n03:35:00\\r\\n\\r\\n\\r\\n– \\r\\nSystem Administrator – Infrastructure Engineer\\r\\nPenetration Testing Engineer\\r\\nExploit developer at https:\/\/packetstormsecurity.com\/\\r\\nhttps:\/\/cve.mitre.org\/index.html\\r\\nhttps:\/\/cxsecurity.com\/ and https:\/\/www.exploit-db.com\/\\r\\n0day Exploit DataBase https:\/\/0day.today\/\\r\\nhome page: https:\/\/www.nu11secur1ty.com\/\\r\\nhiPEnIMR0v7QCo\/+SEH9gBclAAYWGnPoBIQ75sCj60E=\\r\\n nu11secur1ty \\u003chttp:\/\/nu11secur1ty.com\/\\u003e\\r\\n\\r\\n– \\r\\n\\r\\nSystem Administrator – Infrastructure Engineer\\r\\nPenetration Testing Engineer\\r\\nExploit developer at https:\/\/packetstorm.news\/\\r\\nhttps:\/\/cve.mitre.org\/index.html\\r\\nhttps:\/\/cxsecurity.com\/ and https:\/\/www.exploit-db.com\/\\r\\n0day Exploit DataBase https:\/\/0day.today\/\\r\\nhome page: https:\/\/www.nu11secur1ty.com\/\\r\\nhiPEnIMR0v7QCo\/+SEH9gBclAAYWGnPoBIQ75sCj60E=\\r\\n nu11secur1ty \\u003chttp:\/\/nu11secur1ty.com\/\\u003e”,”sourceHref”:”https:\/\/www.exploit-db.com\/raw\/52403″,”cvss”:{“score”:8.3,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:N\/AC:H\/PR:N\/UI:R\/S:C\/C:H\/I:H\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:”https:\/\/www.exploit-db.com\/exploits\/52403″,”category_name”:”Exploit”,”post_link”:””,”product”:””,”version”:””,”vendor”:””,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:”2025-08-11T16:26:28″,”description”:”Titles: Microsoft Edge Renderer Process (Mojo IPC) 134.0.6998.177 – Sandbox Escape Author: nu11secur1ty Date: 08\/07\/2025 Vendor: Microsoft Software:…”,”published”:”2025-08-11T00:00:00″,”modified”:”2025-08-11T00:00:00″,”type”:”exploitdb”,”title”:”Microsoft Edge Renderer Process (Mojo IPC) 134.0.6998.177 –…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[6,8,99,12,40,15,13,7,11,5],"class_list":["post-10374","post","type-post","status-publish","format-standard","hentry","category-category_exploit","tag-cve","tag-cvss","tag-cvss-83","tag-exploit","tag-exploitdb","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n