DNS Spofing is a network attack whereby data is introduced into a Domain Name System (DNS) resolver's cache by an attacker that has no authority, causing diverting injected names to redirect traffic to a host controlled by the attacker.

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Could somebody explain how DNS poisoning might occur in this scenario?

I read the following statement in a security blog using the same source port over and over again for dns queries instead of randomizing them is a vulnerability for dns poisoning Could somebody ...
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1answer
301 views

Kaminsky Bug Exploitation

I am trying to exploit the Kaminsky bug for a school assignment. The specific version of the bug that I want to exploit is sending a forged packet with false information about www.domain.com so that ...
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1answer
2k views

DNS MITM Remote Attack

I guess this is not considered a true MITM attack since the attacker does not have to be between the server and client. My question is how it is possible to poison a DNS cache, and redirect traffic to ...
15
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4answers
5k views

DNSSec (Comcast) vs DNSCurve (OpenDNS)

I was previously using OpenDNS on my internal network. I found out today that Comcast has switched over to DNSSec: Comcast DNSSec. I've done a little research on DNSSec and its benefits. I ...
2
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1answer
138 views

DNS Cache poisioning examples, or other criteria when a client ignores a response

Is there a concise set of rules that describe what 99% percent of DNS responders accept? Conversely, are there are set of rules that define when DNS queries are invalid? I would think that the ...
13
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2answers
4k views

How does DNSSec work? Are there known limitations or issues?

Based on information from this site, DNSSec is needed to protect us from a number of DNS and SSL / TLS hacks, including: DNS spoofing, especially on wifi or shared medium Registrars that abuse their ...
14
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2answers
25k views

DNS zone transfer attack

Hello Guys! Can anyone explain what is DNS zone transfer or give any link, paper? I have already googled, but could not find anything meaningful?
5
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3answers
743 views

How dangerous is it that there are DNS entries for our domain that we did not register?

I was performing an DNS brute-force on our company's domain and found entries like "html" "ww" and "wwww" resolving to IPs outside of our registered block. This sparked a debate about just how ...
5
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1answer
6k views

Spoofing email From address

Providing all legal measures are taken care of, what are some of the ways someone can spoof an email "From" field address and actually get the email to the recipient without spam filters getting in ...
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8k views

How easy/difficult is it to spoof DNS? Are some scenarios safer/more risky than others?

Practically speaking, how easy difficult is it to spoof DNS? What scenarios are more risky than others? For example: A phishing email or twitter link that attracts users to click a hyperlink A ...