Avast! AntiVirus – X.509 Error Rendering Command Execution

• Exploit Database
• 134 阅读

• 作者： Google Security Research
  日期： 2015-10-02
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/38384/
• 1 2 3 4 5 6 7 8 9 10 11 12 13

  Source: https://code.google.com/p/google-security-research/issues/detail?id=546   Avast will render the commonName of X.509 certificates into an HTMLLayout frame when your MITM proxy detects a bad signature. Unbelievably, this means CN="<h1>really?!?!?</h1>" actually works, and is pretty simple to convert into remote code execution.   To verify this bug, I&apos;ve attached a demo certificate for you. Please find attached key.pem, cert.pem and cert.der. Run this command to serve it from a machine with openssl:   $ sudo openssl s_server -key key.pem -cert cert.pem -accept 443   Then visit that https server from a machine with Avast installed. Click the message that appears to demonstrate launching calc.exe.   Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/38384.zip