cloud_config — Format String Exploitation Terminal
┌──(exploit㉿ctf-box)-[~/cloud_config]
└─\$ ./cloud_config --help
🚀 Cloud Configuration Service v2.1.3 ====================================
Usage: ./cloud_config [INPUT_STRING]
Debug Information: • Stack Protection: Enabled (Canary) • ASLR: Enabled • NX: Enabled
└─\$ ./cloud_config --help
🚀 Cloud Configuration Service v2.1.3 ====================================
Usage: ./cloud_config [INPUT_STRING]
Debug Information: • Stack Protection: Enabled (Canary) • ASLR: Enabled • NX: Enabled
Memory Layout
Stack Base
0x7ffeea65a0f7
Heap Base
0x55a135655006
Buffer Address
0x7ffeeb393a2f
Stack Canary
0x71e2339b472d1fd8
Stage Hint
Stage 1 Hint
Use format specifiers to leak memory addresses. What specifier shows pointer values?
Format String Guide
%p
Print pointer (memory address) in hexadecimal
%s
Print string from memory address
%n
Write number of characters printed so far
%x
Print hexadecimal value
%[offset]$
Direct parameter access (e.g., %8$s)
Challenge Information
Vulnerability: Uncontrolled format string in printf()
Objective: Complete 6-stage exploitation chain
Difficulty: Hard (350 points)
Time Estimate: 30-45 minutes
Attempts: 0