A man-in-the-middle attack (MiTM) is an attack against a communication protocol where the attacker relays and modifies messages in transit. The parties believe they are talking to each other directly, but in fact both are talking to the attacker.

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Unencrypted connections between 2 people who use the same ISP, what's the risk?

What is the risk, man-in-the-middle or otherwise, of unencrypted connections between 2 people who use the same ISP, in the same city? If we assume the ISP (and the copper wire that leads to them) is ...
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3answers
140 views

What's the difference between mitm attack and sniffing?

What's the difference between MITM attack and sniffing? Also could anyone name a few other attacks similar to those?
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234 views

Is webRTC safe against man in the middle attacks?

We are implementing an open source software package (copay, a multisig bitcoin wallet), that uses peerJS, which uses webRTC to allow peer-to-peer communication between browsers. peerJS (and webRTC) ...
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47 views

Diffie Hellman Hash MITM

I've seen an application recently that used the Diffie Hellman algorithm. It is not a Ephemeral Diffie-Hellman implementation, but rather a Diffie Hellman one. After the secret keys have been ...
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195 views

SSL / TLS Renegotiation Handshakes MiTM Plaintext Data Injection- medium or low risk?

This is a Nessus finding, which is considered medium by default. Basically it may allow for some plaintext injection which may allow for some man in the middling. My question is, has these been ...
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26 views

Deauth attack without being able to contact the AP

In my home pentest lab I though it would be interesting to try this scenario and see if it works: I have 2 computers and 1 AP, computer A is authenticated to the access point with WPA2 and computer B ...
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41 views

Could I counter SiteKey MitM attack with user-agent identification?

I find it very strange that bank use service like SiteKey without user-agent identification. This still makes them very vulnerable to MitM attack which is exactly what they are trying to protect ...
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1answer
49 views

API request modification

I am building an API that returns data about companies Multiple applications will access the API, some of these applications will have access to one company, some to multiple companies. When a request ...
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107 views

Behavior of trusting a self signed SSL certificate

I have just deployed a Turnkey appliance which comes configured with a self signed certificate. This is a server that only I will be using, so I don't want to pay for a certificate. If I add this ...
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3answers
57 views

Flash cookie and man-in-the-middle

I am using the Scala Play web framework. In it, there is a PLAY_FLASH cookie used to flash messages to the user (it's a cookie so it will still work after several redirects). I put HTML in the cookie ...
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241 views

Why is ettercap targetting the whole network?

I recently tried to do a MiTM attack on my network using ettercap. I have a router, two windows 7 machines : Host A and Host B, and Backtrack on a VM. In the ettercap window I added the router as ...
2
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1answer
110 views

How to simulate man in the middle attack in android emulator?

I am new to pen-testing. Yesterday i analysed one android application using dex2jar application and i saw an android application implemented https connection using empty trust manager. class miTM ...
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4answers
158 views

Mitigating SSLStrip by only serving a site over HTTPS?

So I just learned about SSLStrip now--I feel like I'm so late to the game. What I want to know is: If your site only serves content over HTTPS and hard fails on HTTP requests, with no redirect, are ...
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2answers
65 views

Installing self-made cert as trusted CA on windows?

I'm looking into using mitm-proxy, but part of the process of filtering/snooping SSL is that you must generate and install a root cert as a trusted CA, so that mitm-proxy can generate and throw out ...
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2answers
291 views

LTE networks and MITM

2G would leave you vulnerable to spoofed base stations. 3G tried to somewhat fix that using mutual authentication. Now, I tried to check how LTE handles this but I couldn’t find any usefull ...
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1answer
109 views

SSL decryption without installing a certificate on each client

Given a proxy performing MITM SSL decryption and inspection, is it possible to install a wildcard certificate (*.domain.com) on the proxy signed by a root CA (such as VeriSign or GoDaddy) such that ...
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89 views

How to know if I'm under a MITM attack

If I am connected in a public WIFI , is there any way to know whether I am under attack or not while browsing sites using SSL. For example if I visit facebook.com , if the URL starts with "https://" ...
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3answers
88 views

How can DH provide a known secret to two parties over an unencrypted connection without it being intercepted via MITM?

Without using Private and Public keypairs, i do not understand how Diffie-Hellman is able to generate a secret key between two parties on the internet without passing something between that could be ...
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68 views

Hacked Router Faking a Certificate Authority

Does a typical computer begin with any shared secret with a certificate authority when I buy it? If not, a compromised home router could fake everything and get my credit card info when I attempt to ...
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2answers
115 views

Can ISP use MITM attack to “break” encrypted traffic?

Use connection of A and B as an example. Their communications were encrypted by Public Key Encryption. Before they exchange their public key, ISP MITM attacked. A got "B"'s public key (ISP generated) ...
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185 views

MiTM not working --rejected by router?

I have been attempting to run a MiTM on a very old XP SP3 computer. I have attempted it with 3 products, as listed below: Wireshark: Traffic from the computer did not even show up. (I did see traffic ...
28
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4answers
22k views

What's an easy way to perform a man-in-the-middle attack on SSL?

I'd like to perform a man-in-the-middle attack on SSL connections between clients and a server. Assuming the following: I've got a certificate that the client will accept, via poor cert validation ...
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14k views

How to spoof a cell phone tower (cell site, base station) — homemade IMSI-Catcher

An answer to a recent question has given me an idea for a school project (security CS program). Also, an active attacker (with a fake base station) can potentially force a mobile phone to use ...
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1answer
81 views

Man-in-the-middle attack with public wifi

I'm using Charles to sniff out the traffic on my iPhone at Starbucks and for some reason it won't work with at&t wifi. Google Starbucks wifi does, however. I use my iPhone to connect to the same ...
2
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1answer
43 views

Inconsistant browser warnings for SSL

I am doing a penetration test at the moment, where the client has deep packet inspection for SSL enabled (my guess), as every SSL connection seems to being MITMed. Now, some HTTPS sites, like Gmail, ...
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96 views

How common are mitm attacks behind an ISP?

Yes. Of course using https everywhere is best. But sometimes that's not an option. In those cases, I'd like to make an informed decision. Is there any information about their prevalence? Or would that ...
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88 views

Broadband security question

I have a fixed line broadband connection at home. This morning when I tried accessing Google or Facebook through my browser (Google Chrome) I got a webpage asking me to update my flash player. I found ...
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5answers
417 views

Does the SSL termination happen with the ISP or a mobile service provider? [duplicate]

Is it true that when I connect to a site over HTTPS , my mobile service provider or the ISP gets to snoop in the communication? Can they play MITM?
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32 views

series of SSL errors across multiple sites — reason for concern? [closed]

Rebooted my rMBP late 2013 recently, and saw a set of SSL errors (unable to verify certificate) across a wide range of sites (google, gmail, mubi, medium) and also in the Calendar app as it tried to ...
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How can my employer be a man-in-the-middle when I connect to Gmail? [duplicate]

I'm trying to understand SSL/TLS. What follows are a description of a scenario and a few assumptions which I hope you can confirm or refute. Question How can my employer be a man-in-the-middle when ...
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1answer
5k views

House owner can see who's connected to WiFi; what more can he see?

I live in a rental house, and use the house-owner's wireless network to connect to the internet. The owner can see who is connected to his wireless network and I had a few questions regarding this ...
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1answer
26 views

What are the security issues of a MITM on an ssh session with rsa keypair

If a user connects to an SSH server using an rsa private key, but does not confirm the server's fingerprint. What kind of information can a man in the middle attack get from the session?
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292 views

Network ARP poisoned with Cain but Fiddler not modifying HTML.

The Situation I have successfully used Cain to ARP poison my phone and traffic is being routed via my PC. I have confirmed this in Wireshark and Cain is also able to recover passwords for my SMTP and ...
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42 views

MITM protection, key distribution

I want to make sure each of my apps users only get their own data, and that nobody tampers with it or sniffs it in a MITM fashion. Encryption of everything should be the solution, right? But how do I ...
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How does OTR's authentication using “Question and answer” protect against MiTM?

I've read that the answer has something to do Socialist Millionaire, but I still don't understand how can the user be protected against malicious Man In The Middle, which would capture the question ...
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1answer
50 views

Implementing MITM attack on MAN or WAN

Is it possible to implement MITM attack on larger networks than LAN? For example is is possible to implement such an attack on the whole network of an ISP?
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41 views

Manipulating data during a MiTM

I'm trying to learn some attack methods by myself and I have hit a wall where I can't find any information. I have successfully performed an ARP MiTM between 2 systems and I am able to sniff the ...
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Man-in-the-middle scenario for TLS

Consider the following scenario: You want to securely communicate with a.com and you only trust the VeriSign root certificate. a.com presents a certificate signed by VeriSign with CN=a.com, so you ...
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2answers
65 views

What are the alternatives to ECDSA for an authentication protocol?

In an authentication protocol, S has a public/private key pair known to C, and S and C have established a secure channel (for example, using DH or ECDH, or any other key exchange protocol). C wishes ...
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1answer
60 views

Is code-signing with a non-ssl timestamp unsafe?

Assuming your code-signing tool is secure (e.g., does not suffer from buffer overflow exploits and the like), is there any reason to be concerned if a time-stamping service is not running over SSL? ...
3
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1answer
256 views

How can the OpenSSL CCS Injection vulnerability (CVE-2014-0224) be exploited?

Just curious how this one works in practice and if it's as much of a risk as has been made out? It says you actively require a MiTM scenario, which is understandable, but then what are the steps to ...
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43 views

MITM attack in a star network with proxy server

My community centre has a public computer center. I am pretty sure that it's connected in a star topology with some switch in the center. It also have a proxy server which we need to enter a username ...
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6answers
5k views

How would one fully protect himself against man in the middle-attacks?

Imagine I have a computer where all the trafic is being sent through the MitM. How would it be possible to have a secure connection through this setup? In this case it would be OK to design a new ...
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1answer
44 views

Prevent Replay attacks via timestamp while client clock is not adjusted [closed]

I'm going to send my timestamp to server and server will check if it is in a given interval. What if My mobile clock is not adjusted (say it gives 2:00 pm while now it is 2:00 am). now I lost the ...
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1answer
701 views

Why is the deprecated SSL 2.0 protocol considered insecure and how can it be exploited?

I am making a presentation to the class about "SSL 2.0 deprecated protocol" and I really have no idea how this exploit is used or how the attacker can use this vul. I understand the impact of this ...
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3answers
118 views

Is it secure to be using LDAP, or is LDAPS the only secure option?

I am currently using an LDAP setup. I am wondering if it is secure from Man-in-the-middle attacks or other vulnerabilities?
5
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1answer
221 views

Can an SSH server fingerprint be spoofed?

If I simply connect to an SSH server, get its key fingerprint, and immediately disconnect, does the SSH protocol ensure that the server also had the private key in order to get that far into the ...
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Are MITM attacks possible on HTTP loopbacks?

I have a web server running at example.com. The web server performs a server-side request to example.com which results in a loopback, so the request never passes over the network. Is this request ...
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2answers
55 views

Security risk of Microsoft AD Certificate Services?

We have an internal CA server for our domain located at http://cert_srvr.local.domain/certsrv/certrqxt.asp. This server runs Microsoft Active Directory Certificate Services. When I went to the ...
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3answers
82 views

How are public key certificates updated securely?

Let's say I get a new computer that's never been connected to the internet before. The first time I connect it to the internet, is it susceptible to a mitm attack while downloading its public key ...