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.

learn more… | top users | synonyms (1)

1
vote
3answers
158 views

MITM on program with no proxy settings

I'm trying to inspect the traffic of a program (which is running on my computer) that uses SSL over TCP to a non-standard port. The traffic may or may not be HTTP traffic, likely isn't. Neither ...
2
votes
1answer
51 views

SSL certificate trust chain shows root certificate with 1024-bit public key - Is this evidence of a MITM attack?

My account at my domain name registrar was hacked and I am trying to understand how the hackers were able to steal my login credentials. Because the root certificate in the trust chain for the ssl ...
2
votes
2answers
50 views

Forwarding an SSL connection

My general question: Can a two-way SSL connection be forwarded to a 3rd server? The specifics: I have a WebLogic server supporting two way-SSL, client side's cert is from their CAC card. The ...
-3
votes
1answer
105 views

Is it possible for someone to read Gmail messages with a man in the middle? [duplicate]

Assuming these hypotheses: 1) Your account isn't hacked (hacker has not entered your account directly) 2) Gmail encrypts via SSL end-to-end 3) The hacker is not Gmail or Google 4) There is no ...
23
votes
5answers
2k views

What prevents a man in the middle from requesting a certificate for your server?

Let's say you have a server at shop.example.com and you are requesting a certificate from some trusted CA like Comodo (they say they'll issue it within few minutes online). First of all, how can ...
4
votes
3answers
1k views

How do I verify someone's identity if the only method of contact is their email address?

Email addresses can be hacked or perhaps even spoofed. I need to pay individuals via paypal and I fear that over time people's email will change or become compromised. How can I ensure I am paying the ...
0
votes
0answers
18 views

OTR and active Man In The Middle attacks [duplicate]

As I'm currently playing around with cryptography, especially OTR, I'm wondering about its security against active MitM attacks. Let's say Alice and Bob created an OTR session, but Eve is acting as ...
5
votes
4answers
117 views

MITM attack between me and TOR entry node

In which ways can my ISP, who by the way controls the WiFi router I connect to, do a MITM attack on my TOR connections and hence read the traffic?
3
votes
3answers
107 views

Detecting a MITM attack

If my session is under a Man-In-The-Middle attack, can I detect it by checking the ip addresses my machine is connected to? For example, I want to know if my connection to a certain website is MITMed ...
-2
votes
0answers
32 views

Are there any notary-like services for standard HTTP content? [duplicate]

One of the things I've consistently noticed is that a lot of open source projects and companies publish the public keys they use to sign packages on HTTP sites, with no HTTPS equivalent. I've come to ...
2
votes
1answer
52 views

Security bounds of TLS client authentication (from browsers)

Say that there are two servers that perform TLS. Both servers have valid end-point certificates. In other words, neither of them would raise a warning from the browsers after the connection has been ...
1
vote
2answers
98 views

How do I perform a legal SSL MitM attack for my company?

I have been given a task to test some of our company's security. I have SSL stripped before but on a very basic level and now days with the security is a bit harder. I want to allow all HTTPS traffic ...
3
votes
0answers
41 views

Is it possible for an SSH MITM to attack only if the key isn't in the known_hosts?

I was trying to connect a server using a different port when the network seemed too slow. It gives an ECDSA key, while the previous key in the known_hosts is RSA. I refused to continue the connection ...
3
votes
1answer
56 views

Security of OpenVPN against sophisticated DPI solution

I'm planing to build a device (prototype) that act as a portable security gateway. To make this, I choosed OpenWRT running on Raspberry Pi with OpenVPN for VPN connection. My main purpose of this ...
5
votes
2answers
744 views

HSTS bypass with SSLstrip2 + DNS2proxy

I am trying to understand how to bypass HSTS protection. I've read about tools by LeonardoNve ( https://github.com/LeonardoNve/sslstrip2 and https://github.com/LeonardoNve/dns2proxy ). But I quite ...
20
votes
7answers
4k views

Safe to make a VPN connection over coffee shop WIFI?

On my work laptop I regularly create a VPN connection that I use to remote desktop to our web server. Is this safe to do on a coffee shop where random people are connected to the same wifi network?
3
votes
1answer
112 views

How was my email intercepted? [closed]

I've recently sent an email to a non-Protonmail user, using a code phrase. Someone on the recipient's home network was able to intercept the email and responded to me in detail as to the content of my ...
0
votes
2answers
93 views

Could a compromised root CA impersonate any SSL certificate?

My question is about MITM attacks against https and how those would appear to the end user. Suppose a trusted root CA were compromised / coerced into producing fraudulent SSL certificates. What would ...
-2
votes
1answer
58 views

Tor website HPKP (key pinning) failure

I'm currently facing a key pinning error when trying to access the torproject.org website with Firefox. Is anyone facing the same problem? Does anyone know if they changed their certificate? If not, ...
1
vote
0answers
41 views

For attackers looking to launch arp spoof on a target, does the attack have to happen in real time?

I was surfing the web at 3 in the morning and I got a warning which seems to indicate a MITM attack. Does this mean the attacker was able to passive sniff my activity in real-time in order to launch ...
1
vote
4answers
104 views

is it easier to eavesdrop on ethernet connection rather than wifi?

I heard someone say that ethernet connection is vulerable if someone can connect to your LAN, and that the traffic isn't encrypted in the way it might be if you're using WPA wifi encryption. Is this ...
3
votes
2answers
511 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 and the URL starts with "https://", ...
2
votes
4answers
79 views

What are some ways to spot email spoof attacks?

I use Gmail and I started getting malicious-sounding emails from people I know intimately. The people I spoke to said they did not send those emails. In order for the attacker to carry this off, are ...
4
votes
1answer
126 views

Man in the Middle Attack against NTP

So, lately I've been really into penetration testing and learning the nitty-gritty of tech. I'm dong courses on computer architecture, cryptography, surveillance law, and computer networks. I never ...
1
vote
1answer
44 views

Influence of SSL Intercept on SSLVPN

We're considering implementing an SSL Intercept proxy in my organization. It will perform a SSL MITM to be able to inspect traffic. It will be a solution of a commercial vendor. It is clear that we ...
2
votes
0answers
43 views

If I install a certificate for the purposes of logging into a Wifi connection, is it still safe?

There are some wifi networks (large universities for example) which use HTTPS to get to a login page, and in order to verify that they have not been spoofed, provide the certificate ahead of time ...
3
votes
2answers
46 views

Security of nested ssh

First of all, by nested ssh, I mean the following way of using ssh: ssh usera@Bob 'ssh usera@C' suppose A wants to login on server C, but for some reason C is not directly available to A (e.g. C's ...
3
votes
2answers
153 views

How can I tell if my ethernet connection is being sniffed? [duplicate]

I read in another post that wired traffic is not protected: The only real additional threat that a malicious network administrator would pose, is that they have access to the wired side of the ...
0
votes
0answers
27 views

Can Bluetooth be man in the middle'd at the L2CAP layer?

Bluetooth HID devices can be man in the middle'd with two bluetooth dongles and this code http://ossmann.com/shmoo-2010/ Is this technique limited to just HID profile bluetooth devices or could this ...
1
vote
2answers
5k views

Unrecognized leaf certificate

Every 15 minutes or so I get this message in my system.log Apr 25 22:05:36 Ivans-MacBook-Pro.local apsd[194]: Unrecognized leaf certificate Apr 25 22:20:57 Ivans-MacBook-Pro.local apsd[194]: ...
0
votes
2answers
76 views

Faking IP address without being aware of returning response

I read different articles on the subject (Spoofing IP address), someone said: Spoofing an IP is usually better suited to "fire-an-forget" scenarios like DDoS. due to TCP two-way communication ...
0
votes
1answer
98 views

Why am I sometimes spontaneously presented with an SSL certificate from my U-Verse Residential Gateway?

Sometimes, we will experience a brief "hiccup" in our AT&T UVerse internet service. When this happens, and a user happens to be surfing the web at the same time, we will suddenly be presented with ...
2
votes
1answer
73 views

How can MITM be performed in WebRTC?

From what I could tell, certificates are self-signed. When A wants to call B, after they finish relaying data to server, they initiate communication with each other. Certificates are self-signed, ...
0
votes
3answers
80 views

Is it possible for an attacker to redirect a packet sent by a client, modify it then sent to original server

Theoretical question: Is it possible, or will it ever be possible, for an attacker to sniff/intercept it and redirect a packet, sent from a client through wireless, modify it and then sent to the ...
0
votes
2answers
49 views

Sniffing TLS / SSL through HSTS?

Imagine the following: Client C wants to communicate with server S. The evil attacker A is the Man-In-The-Middle. C sends a request to S, A intercepts it. A creates a self-signed certificate with ...
0
votes
0answers
61 views

Does HTTPS protocol leak HTTP body length?

It seems that in a MITM attack, hackers may know the whole HTTPS packet size sent through the network (i.e. size of HTTP headers + HTTP body + overhead). Besides that, does the HTTPS protocol also ...
0
votes
2answers
62 views

Protect SSL connections from MITM for users with modified clients

I'm working on a web app that uses SSL. I'm afraid that some people might access the app via a network that uses a proxy to intersect and inspect the SSL traffic [MITM]. Some people might access the ...
2
votes
0answers
274 views

SSL traffic manipulation through ettercap MitM and iptables

I am trying to understand the relation between some tools and concepts used for MitM on a wifi network and how https transaction (over this wifi network) between an android app and the respective ...
1
vote
2answers
496 views

Can a wifi provider decrypt HTTPS usind MITM without users noticing? [duplicate]

As a router, can I send forged certificates, and intercept requests to CA and return responses that they are valid. So I could MITM all https traffic, and spy on my users?
1
vote
2answers
69 views

ARP poison detection [duplicate]

I tried ARP poison on my local test system with ettercap. It was successfully, so I decided to run a test on most secure systems, like Facebook and Google, but I could not reach them and they warned ...
1
vote
3answers
85 views

Risks associated with HTTP content injection?

I'm curious about the risks associated with HTTP content injection, where an ISP injects content to pages accessed over non HTTPS connections. Some examples: ...
0
votes
1answer
55 views

MITM sniffing packets

I fail to understand how a MITM attack sniffs packets and modifies them.In the case of ARP spoofing although the attacker has spoofed the MAC address of a host, how does he modify it as the IP layer ...
23
votes
4answers
1k views

How can a web application protect IE users when this browser doesn't support HSTS?

HTTP Strict Transport Security (HSTS) is a very useful feature at preventing OWASP a9 violations and attacks like SSLStrip which try and prevent the client from making a secure connection. My ...
0
votes
0answers
106 views

Is facebook to facebook (mobile application call ) encrypted?

I understand facebook uses WebRtc to send voice data packet in network if any one end client is on the browser. Use of DTLS packets can be seen in captured (wireshark) file. But in case of mobile app ...
1
vote
0answers
98 views

Perform SSL MITM -> Decrypt packet -> Modify packet -> Encrypt packet -> Send it [closed]

I have a victim and a server. My goal is to intercept traffic, perform SSL MITM, decrypt packet, modify it, encrypt and send it further. Everything has to be on-the-fly and protocol agnostic. For now ...
6
votes
2answers
383 views

What to do about “approved” direct banking MITM sites like sofort.com?

Brussels Airlines allows several payment types, only two of which are free: Maestro and Sofort Banking: The second option was new to me, but direct debit is usually a free and practical way to pay: ...
8
votes
2answers
1k views

Man in the middle attack theory [duplicate]

Me and my colleague are trying to come up with a way around preventing a theoretical man in the middle attack. The scenario is: Communication is only through one channel and either sides isn't ...
3
votes
1answer
53 views

Is it safer to store valuable information on a unsecure client or send the data through the internet?

Background: I'm creating a secure web app with the purpose to act as a no-knowledge storage for small data (we're talking a few bytes). Since all the encryption and decryption happens client-side, ...
3
votes
1answer
108 views

Any tools like PuTTY for manually stepping through network communications?

Are there any tools that would allow me to "manually" step through the network-stack processes of a device connecting to a network and communicating with other devices? Similar to using PuTTY to ...
-1
votes
1answer
56 views

Does MITM attack work across Remote Systems?

I have question about if MITM works across remote systems? Often, I'm doing internal penetration test, but I'm not sure about how to do MITM attack when I am outside from that network. Does classic ...