本文共 2107 字，大约阅读时间需要 7 分钟。

pwn-200 Vulnerability Analysis

Overview of the Issue

The sub_8048484 function in the provided code is vulnerable to a stack overflow attack. This function reads data into a buffer using read(0, &buf, 0x100u) which can cause a stack overflow if not handled correctly. The vulnerable code is:

ssize_t sub_8048484() {
    char buf;
    setbuf(stdin, &buf);
    return read(0, &buf, 0x100u); // Overflow here
}

Exploiting the Vulnerability

To exploit this vulnerability, we need to analyze how the stack buffer works. The function uses a single-byte buffer and attempts to read data directly into the stack without proper bounds checking. Exploiting this requires understanding how the stack is structured and how overflow affects it.

The key to this exploit is to identify the location where the return address is stored after the stack overflow. By overwriting the return address, we can control the program's flow and gain arbitrary code execution.

Finding libc Base

Using the provided exploit code, the following steps can be taken:

Exploit Execution

The provided remote exploit code demonstrates how to:

By following these steps, a full RDI (Remote Differential Exploit) can be achieved, allowing for full control over the system.

转载地址：http://amppz.baihongyu.com/