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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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 ...
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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 ...
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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 ...
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193 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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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Are VPNs using shared secret susceptible to trivial MITM attacks

I'm looking at a few VPN providers and many seem to offer L2TP VPN but they seem to share their shared secrets publicly on their website, for example : Goldenfrog ...
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forcing a traffic redirect?

I am trying to get my machines to be force through a MiTM and the MiTM to redirect them to a server of my choice (which happens to be the MiTM on port 17002) I am running ip tables: sudo iptables -t ...
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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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113 views

Routing Protocol Encryption

As far as I know 'newer' versions of routing protocols support authentication between routers. What about encryption and integrity checks? Some implementations like this one from Cisco use MD5, which ...
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Does ZRTP provide useful protection, given that the SAS is not verified?

Firstly, some important backstory. I'm producing a corporate version of an IM/VOIP/Screensharing client using the Open Source Jitsi. We are going to be using a central server and have already ...