Exploit Avast! AntiVirus - X.509 Error Rendering Command Execution

Exploiter

Хакер
34,644
0
18 Дек 2022
EDB-ID
38384
Проверка EDB
  1. Пройдено
Автор
GOOGLE SECURITY RESEARCH
Тип уязвимости
REMOTE
Платформа
WINDOWS
CVE
null
Дата публикации
2015-10-02
Avast! AntiVirus - X.509 Error Rendering Command Execution
Код:
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'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
 
Источник
www.exploit-db.com

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