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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Does HTTPS Everywhere defend me against sslsniff-like attacks?

http://www.thoughtcrime.org/software/sslsniff/ If I have a domain on my HTTPS Everywhere list, so that theoretically it could be only visited via an HTTPS connection in my Firefox, then could an ...
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1answer
23 views

Detect possible router attack attemp

I have huge problem with my router: Sagem F@st 3202. Here are some Security log events: Inbound Traffic | Blocked - Default policy | TCP XX.XX.XX.XXX:80->XX.X.XX.XX:51707 on ppp0 ...
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2answers
95 views

What prevents me from using ARP poisoning to force a client to use HTTP?

So I was just thinking about how ARP poisoning can be used to intercept a clients request, forge an SSL cert, and send it back, with the caveat of not meeting certificate validation, but what if I ...
2
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1answer
136 views

Why is the SSL handshake not shown in Wireshark?

I am trying to figure out if some Android applications with login functions are vulnerable to man in the middle attacks or not. I have set up a MITM proxy (as an attacker) on my lubuntu machine and ...
2
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1answer
68 views

How does a client know that a DNS zone is DNSSEC protected?

Recently, I've been reading about DNSSEC and how it works. I found other questions and some very interesting answers on this and other websites related to this matter. However, I have a question to ...
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1answer
199 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 ...
1
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1answer
43 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 ...
3
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0answers
23 views

Is DNSSEC immune to stripping signatures?

In my opinion, it should be possible to forge DNS reply so it doesn't include DS/RRSIG/... parts for any request, thus bypassing DNSSEC validation of resolved domain. Is DNSSEC system immune to this ...
1
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1answer
262 views

Would there be MITM attack even fix the heartbleed vulnerability? [closed]

I have read this post askbuntu, the step to fix the heartbleed vulnerability almost: 1. upgrade openssl. 2. generte new keys. 3. revoke the old certificates. Some posts say attackers may have got ...
0
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2answers
63 views

Are SSL encrypted communications through a company network safe?

If I'm using Skype, Facebook, or another type of communication at my work, can the network administrator see my Skype and Facebook conversations, although its encrypted with SSL? I found this text: ...
24
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3answers
17k 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 ...
8
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2answers
680 views

HTTPS login vs MITM attack

http://www.troyhunt.com/2013/05/your-login-form-posts-to-https-but-you.html My question is, if the threat is that someone controls your internet connection and can serve up bad login pages, couldn't ...
6
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2answers
2k views

How to detect the NSA MITM attack on SSL?

As Bruce Schneider reported here... https://www.schneier.com/blog/archives/2013/09/new_nsa_leak_sh.html ...the NSA reportedly performed a MITM attack on a company in brazil and decrypted their SSL ...
1
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0answers
60 views

Threats against website running without TLS but with PGP messages

Are there any threats against a web site that isn't running SSL but uses PGP to encrypt all information to the server (except session identifier) The information flow is as such: 1. Session ID set on ...
1
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1answer
110 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 ...
0
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1answer
18 views

Safely creating and communicating within a fully decentralized p2p network

I'm not entirely sure if this is the right place to ask this, and I'm also slightly fuzzy on how the p2p system works, so correct me if I'm wrong. I've been looking into the practical implications of ...
2
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1answer
259 views

Why am I unable to connect to an address spoofed with arpspoof?

I wanted to see how many combinations of websites and browsers are still vulnerable to a tls stripping attack (like, by implementing HSTS or disabling cleartext HTTP altogether). To do it I wanted to ...
2
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0answers
63 views

Router eavesdropping on SSH tunnel? [migrated]

So I'm on a public WiFi network that blocks websites like YouTube in order to conserve bandwidth. I'm assuming the router is monitoring all traffic and rejecting all requests sent to the sites on its ...
14
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4answers
766 views

Is it possible to boot an encrypted server remotely and securely?

Imagine you have a server that is at a location which is not trustworthy. People might have physical access to the machine who are not supposed to look at the data stored on it. In this scenario I ...
2
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1answer
45 views

Can IP phones be eavesdropped upon if administrator access is available?

I am interested in demonstrating an attack to my university's security team on IP phones installed at the university. The IP phone models are Siemens optipath410. Basically, using nmap, I identified ...
2
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3answers
84 views

Can MiTM and similar attacks be performed on seperate networks

Okay, suppose that I have 2 computers: Computer A and Computer B, connected with this setup: A->switch->router->internet / B->router/ and the closest router to computer B is ...
13
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4answers
3k views

Does Tor Hidden Service Protocol provide more threat protection than a standard HTTPS session?

DuckDuckGo is a search engine that has a Tor Exit Enclave and hidden service. This site is focused on the safe, secure searching of its users. Since DNS is not used in Tor, it appears that HTTPS is ...
1
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1answer
168 views

Does Skype Trump SSLStrip?

I am using SSLStrip against my own computer, but am not being redirected to HTTP. Skype automatically starts up and logs in at my computer's startup, so I was wondering whether the fact that port 80 ...
14
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5answers
2k views

How safe is SSL? [closed]

If I got an SSL certificate for my website and use an SSL secured connection (HTTPS), is this safe enough to send my login and password data or should I add some encryption or hashing? And how safe ...
0
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1answer
61 views

MitM Attacks - Iptables?

I have looked for the answer to this question to no avail, apologies if I missed it. I would like to know how effective iptables would be against MitM attacks - in the following setup: ALLOW INPUT ...
0
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1answer
89 views

CAPTCHA Bypassing with Captcha Clipping Attack is Like MiTM between servers, Is that even Possible?

Sorry if this is a very amateur question. I was checking out some article regarding CAPTCHA bypassing. And I though this article seemed interesting ...
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45 views

MITM Attacks with Web GUI

I'm thinking of writing an application that communicates sensitive information (using Python, if that's relevant). Instead of using the standard GUI libraries (like GTK, Qt or wxWidgets), I was ...
2
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0answers
91 views

HMAC solution for a rest API

I'm trying to learn some things about REST apis and one of the topics that I'm having some trouble is security. I'm using angularjs for web interface ans slim framework for the php api. I've read ...
0
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2answers
86 views

Protecting against/detecting a specific Man in the Middle attack

I'm working on a specific (hypothetical) situation, where I have two client machines attempting to perform a public key exchange, via a server. There's no possibility for a direct connection between ...
1
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1answer
67 views

Behavior of trusting a self signed SSL certficate

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 ...
0
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1answer
52 views

Wouldn't transient cookies for session management increase effectiveness of MITM?

According to wikipedia, a transient cookie (aka session-cookie, in-memory cookie) is forgotten when the user closes the browser. These are also recommended for session cookies by OWASP. I've seen a ...
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1answer
76 views

Legitimate use case of man-in-the-middle attack for DPI?

I am working on a device that should sit between the end-user and the server, and that will do deep packet inspection. It is basically a parental control node. This device will be sold to the user, so ...
0
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1answer
71 views

Man in the middle and goto fail

My question is inspired by apples goto fail; bug. I am wondering if the bug is really as dangerous as it is propagated everywhere. The reason I am in doubt about that is that there is a MITM attack ...
2
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1answer
79 views

Does using Chrome bypass the Apple iOS gotofail bug ?

Does the recent certificate gotofail bug affect me if I'm running version 6 of iOS, but only use Chrome as my browser?
2
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0answers
209 views

What is going on with my download of the recent Apple security update?

The update in question is the Mavericks combined update which, among other things, claims to fix the recent SSL vulnerability/gaping hole. This issue really annoyed me, so I decided to procure ...
1
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3answers
123 views

Would SSH MitM attacks utilize spoof IPs?

I am presented with SSH log from a SSH server and the said SSH server only accepts connection from 2 known public IPs over WAN. The content of the log shows that a user was successfully ...
1
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0answers
18 views

Secure channels without web-of-trust or CA

I was reading about Impagliazzo's five worlds and I have some questions about cryptomania and minicrypt: What is difference between them? I cannot find one? How does cryptomaniac MitM protection work ...
0
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1answer
47 views

How much harm can an attacker do on the Diffie-Hellman exchange?

I'm looking at a system that uses an unprotected Diffie-Hellman exchange to negotiate a key for the session encryption. That Diffie-Hellman is not secure against man-in-the-middle attacks is textbook ...
0
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2answers
68 views

Proxy traffic via MITM script

I want to log and modify outbound traffic on a Linux machine. I currently have one program that sends requests out to the internet, I would like to process these requests and their responses via ...
1
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0answers
61 views

Does Diffie-Hellmann (DH) key exchange protocol lower Off-The-Record protocol (OTR) security level?

Off-the-Record protocol employes Diffie-Hellman key exchange protocol (DH). DH protocol does not provide authentication of the communicating parties and, according to many sources, is vulnerable to ...
2
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2answers
146 views

DNS cache poisoning in LAN without MITM

Many questions have already been asked about DNS cache poisoning (aka Kaminsky attack), however I couldn't find a clear answer to my question: Is DNS cache poisoning possible in a LAN, without ...
1
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1answer
72 views

Is it dangerous to sync my data with my personal server through unencrypted http?

Since Apple force iPhone users to use iCloud to sync contacts & calendar, I moved to a local ownCloud instance that works well. However, it would be more convenient if I could sync everywhere and ...
1
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2answers
75 views

Why do client certificates not protected against improper server certificate validation

I understand the question of client certs and MITM attacks has been asked several times, but I don't believe this specific scenario has been answered. It was my (seemingly incorrect) assumption, that ...
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2answers
472 views

Sniffing From Squid SSL

I created a Squid proxy and a self-signed SSL certificate. The SSL certificate on the server is a private certificate linked to the ssl-bump feature. I am using tshark to dump the SSL traffic, but I ...
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2answers
189 views

Actually, isn't it bad to redirect http to https? [duplicate]

I have a two-part question about question #570288 over on ServerFault. Question: Is it bad to redirect http to https? Accepted answer (185 up-votes): [...] Hell no. It's very good. Part 1 ...
0
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2answers
184 views

Man-in-the-middle SSL generation on request possible

I am doing some research on man-in-the-middle focusing on SSL in particular. I have been looking into generating a certificate on request when a client connects and requests a secured page. ...
0
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1answer
184 views

Sniff HTTP(S) from PPTP VPN server

I've setup an PPTP VPN server on my Debian 7 server. I'm using this VPN in combination with my Android phone to ensure a secure connection. However, i'm getting curious of what my phone is sending ...
3
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2answers
62 views

How does a Short Authentication String (SAS) mitigate MITM attacks?

Reading about Silent Circle, and more specifically Silent Text, I learnt that by implementing SAS, the likelyhood of a MITM attack is greatly reduced. Could someone please explain how this works? If ...
0
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2answers
157 views

Is using an SSL Session ID along with a cookie based session verification more secure or not really?

I am using Django which is a web framework for Python. I love it but the session handling is cookie-based. Now over SSL I'm sure it's reasonably "secure" but I don't think there is any kind of fail ...
2
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2answers
218 views

Any MITM tool for forcing weak SSL cipher suite?

Let's say I'm trying to reverse engineering communctions between an Android app and a web server uing HTTPS. At beginning, I tried to do MITM using webmitm and a fake cert. But the app failed to ...