Binary Heaven - Reverse Engineering Go Binaries, ret2libc Buffer Overflow, and PATH Hijack to Root...

The provided document outlines a detailed walkthrough and analysis of an advanced penetration testing scenario involving multiple layers of security challenges, including anti-reversing techniques, buffer overflows, SUID vulnerabilities, and general hardening recommendations. Here's a summary of the key points:

1. Initial Reconnaissance

• Static Analysis: The first step involves using tools like radare2 to analyze the binary for any obfuscation or anti-debugging mechanisms.
• Credential Extraction: By identifying XOR-encoded strings in the binary, the username and password are extracted.

2. Exploitation Phases

Phase 1: SSH Login

• Credentials Discovery: Using static analysis tools like radare2, the credentials for the Go binary are deciphered from an encoded string.
• SSH Access: The discovered credentials allow access to the system as the guardian user.

Phase 2: Buffer Overflow Exploitation

• Leaked System Address: The target binary contains a stack buffer overflow vulnerability and leaks the address of system(), making it trivial to bypass ASLR.
• ret2libc Attack: By overwriting the return address with the leaked system address, an attacker can execute arbitrary commands as the `

Read the full article at InfoSec Write-ups - Medium

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