An attempt by a threat to exploit a weakness in a system.

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71
votes
8answers
6k views

How would one crack a weak but unknown encryption protocol?

I was reading this interesting question: Is my developer's home-brew password security right or wrong, and why? It shows a weak home-brew algorithm developed by "Dave", and the answers discuss ...
13
votes
2answers
335 views

Concrete figures on password cracking in the wild

While password guessing is a science, not every attacker out there is up-to-date with the latest advances or cares to invest in GPUs or FPGAs. It's easy enough to test online password guessing ...
4
votes
3answers
141 views

Does allowing everyone know when a server process was started pose a security risk?

I recently found that in Microsoft .NET framework an impersonated thread is not allowed to request "time at which the current process was started". This could be done intentionally or this could be ...
0
votes
0answers
25 views

CRIME attack clarrification [duplicate]

I am not understanding CRIME attack completealy.. First an attacker runs a script to caputure the encrypted cookies later using the captured value an attacker try to bruteforce the next cookie ...
4
votes
2answers
495 views

Is this an example of XSS attack?

A scripter sees on certain web pages it's technically possible to include markup like HTML and CSS/JS. It's technically possible to submit a javascript or iframe and have it display to the visitor ...
32
votes
4answers
3k views

Should I change the default SSH port on linux servers?

Is there any advantage in changing the SSH port, I've seen people do that, but I can't seem to find the reason why. If you have a strong password and/or a certificate, is it useful for anything? ...
4
votes
4answers
217 views

What kind of attacks result in an attacker only being able to leak a site's database?

Of the public disclosures I've seen from recently compromised sites, it seems common for only the database to be leaked, rather than the application code, or rather than a complete takeover. Is this ...
14
votes
5answers
11k views

Security risk of PING?

I have been told that PING presents a security risk, and it's a good idea to disable/block it on production web servers. Some research tells me that there are indeed security risks. Is it common ...
1
vote
1answer
860 views

Can active attacks really decrypt a particular AES-256, CBC, PKCS#7 encrypted file?

I recently found out that active attacks are a threat against AES-256, CBC mode, padded with PKCS#7 (the CBC mode in particular. I should supposedly change to EAX to guard against these attacks). ...
0
votes
1answer
423 views

How to conduct a disguised LSA attack against OSPF?

I want to do disguised LSA attacks on OSPF network and be able to more analyze, so I do not know how it works in practice. This is a penetration test. The attack is described in the address [+]. I ...
0
votes
2answers
156 views

How can I encrypt something user provided without risk of the key being exposed?

So, let's say I have a theoretical service. User has some text they want to encrypt. They pass it to me, and I encrypt it. Then, only I should be able to decrypt it afterwards. Another kicker, it must ...
4
votes
2answers
280 views

How can I find out who owns a block of IPs?

I'm currently going through the logs on my apache install for potential intrustions, and I'm finding a lot of hits for SQL injections and exploit testing, from 173.212.195.* . I'm now trying to find ...
5
votes
2answers
342 views

Is this a DNS attack?

The following graph shows the UDP DNS queries/sec (blue) and DNS responses/sec (red) of traffic passing a router over the preiod of 4 days. DNS query is a DNS packet with query/response flag set to 0 ...
1
vote
5answers
609 views

Site backdoor & eval()

I'm running a Joomla 1.7 site which was hacked today. Below script did the hack. ...
0
votes
1answer
188 views

What type of attack should be used in order to pass this authentication

I am practicing the Astalavista Wargames and i came across this challenge. The question is: Bob wrote a piece of software but the password verification doesn't seem to work. You must find a way to log ...
3
votes
2answers
457 views

An attack from my Employer

I am working in an ISP company as a junior support specialist. Recently, I have a serious suspicions that one of our "head" stuff member is compromising me by being able to control(see) my traffic.. ...
4
votes
4answers
257 views

Security risk of adding a HTTP Header with server identifier

We are about to deploy a web application to a web farm of quite a few web servers. During our testing we have found issues happening in one of the servers but not in others. Most of them because of ...
1
vote
2answers
493 views

Secure against HTTP FLOOD ATTACK

What is the best way to defend your web site against HTTP FLOOD POST/GET ATTACK ?
1
vote
1answer
279 views

Determining the target address in a heap overflow

For a heap overflow to occur and arbitrary code to be executed, the function free() performs the step : hdr->next->next->prev = hdr->next->prev I understand that the address of ...
0
votes
1answer
139 views

What is the method used in the New York Times attack? [closed]

In the recent New York Times attacks, how did the attackers gain access to the server? Additionally, is there any evidence that these attacks were launched by China, aside from the proxy?
4
votes
4answers
382 views

Received a Kindle from a stranger, what are the risks?

While getting a coffee today, a man walked up to me and offered me a kindle. he said he no longer wanted it and that he was looking to give it away. An avid reader, I accepted. It has no accounts on ...
3
votes
2answers
726 views

How does the Yahoo webmail exploit work?

I got an email (referring to me by name) from somebody I knew a while ago and the email itself was just two/three lines containing a bit-ly link. Although it seemed like it actually could be ...
8
votes
2answers
2k views

How should one prepare himself for a job interview for penetration testing?

So, the title basically says it all. I would really like to hear out some of the more experienced friends here with their answers for this. Should it revolve around the ability to verbally explain ...
4
votes
5answers
222 views

Can SSL requests be proxied by issuing a second certificate?

Alice wants to login to her account at https://www.bobsbank.com/. However she clicks on a malicious link in an email and instead gets sent to the malicious site https://www.charliesbank.com/. The ...
2
votes
3answers
911 views

Disadvantages of HTTP GET/POST Flooding Attack?

I asked about What is HTTP GET/POST Flooding Attack? recently and I got a few detailed answers about what they are and how they work. Now I want to find out what are the disadvantages of them.
106
votes
8answers
10k views

Are “man in the middle” attacks extremely rare?

In http://cdixon.org/2012/02/12/the-iphone-contact-list-controversy-and-app-security/ Chris Dixon makes a statement about web security Many commentators have suggested that a primary security ...
12
votes
8answers
984 views

Randomizing MAC addresses on bootup

Since it is possible to set custom MAC addresses, wouldn't it make sense to have a new one as often as possible/convenient (i.e. on bootup)? It would seem that is useful to both attacker and victim ...
1
vote
2answers
619 views

How is iptables useful to prevent attacks against a LAN?

I need some advice securing a LAN using iptables. I've found lots of examples on how to secure single host with iptables, including scanning ports, attacking using ICMP-flood and TCP-flood. These ...
1
vote
2answers
2k views

Snort false positive?

I've set up snort and am configuring it for my network. I have one vpn server making a connection to my dns/AD server. This connection sets off: GPL SHELLCODE x86 inc ebx NOOP The payload is as ...
2
votes
2answers
1k views

Difference between masquerading and replay attacks?

I know that masquerading is to impersonate a false identity and replaying is the same wherein unauthorized person uses the credentials of the authorized one to have the privileges.Then what is the ...
7
votes
2answers
1k views

Is it possible to do HTTP header injection if CR/LF are stripped?

In HTTP response there is the following header with attacker controlled content: Content-Disposition:attachment; filename="attacker_controlled.html" The only characters that can't appear in ...
7
votes
1answer
885 views

ASP.NET HTTP Response Splitting Attack

By default ASP.NET checks for HTTP Response Splitting attack when you do Response.Redirect: ...
-1
votes
1answer
292 views

Why is it hard to catch cybercriminals? [duplicate]

Possible Duplicate: Why is it difficult to catch “Anonymous” or “Lulzsec” (groups)? I really want to know why the attackers behind the major attacks like Diginotar hack ...
5
votes
6answers
1k views

What does it actually mean when someone says their website is hacked?

I have seen many people say that their website has been hacked using some vulnerability. I never fully understood what this means. To me the only way to get control of website is get the FTP ...
0
votes
3answers
155 views

How to retrieve a site whose server is running Linux

I'm struggling to find a way to retrieve through Google a list of sites having Linux as their server operating system. Actually, I'd like to be able to test the following command: nmap -O ...
2
votes
2answers
292 views

DNS cache poisoning

What are the things the attacker needs to know from the victim to perform DNS cache poisoning ? for example : IP , Port number and Transaction number what else ?
1
vote
1answer
116 views

How to know what's the type of an attack and from whom is sent?

I'm currently running a game server on a dedicated Windows 7 machine and it is being attacked. How do I know what kind of attack it is and from whom is sent? When he attacks, the RDP freezes and the ...
3
votes
1answer
245 views

what is the difference between virus, worm, trojan and other malware [closed]

Looking through the questions in IT security, I found out that there is no answer which cover this question in depth. I am aware of the answer and just hope to see something detailed about: main ...
6
votes
1answer
595 views

What is the difference between Simple Power Analysis and Differential Power Analysis?

What is the difference between Simple Power Analysis (SPA) and Differential Power Analysis (DPA) and why is it not possible to do an SPA attack on FPGAs? My basic understanding is they are ...
56
votes
18answers
3k views

What security resources should a white-hat *developer* follow these days?

What sites, twitter accounts, FOSS software should a white-hat code 'hacker' follow these days? Do Include: Late breaking information on new security issues (RSS, Twitter, etc) A website that ...
2
votes
1answer
227 views

White-Box Cryptography Questions and References

I have recently started reading about White-Box Cryptography and looking at references/papers/web sites. A have a few questions I was hoping to get guidance on. As far as I can tell, WBC has ...
4
votes
5answers
3k views

What kind of attacks against home router's NAT do exist?

I always thought NAT was some kind of a security feature and I still think it is, because if it didn't existed the internet, respectively the clients behind NATs, would be even more insecure, since ...
2
votes
1answer
237 views

solaris equivalent of /proc/self/environ LFI

I need to exploit a Solaris vulnerability for class, but we never dealt with Solaris before and I never installed it. Does Solaris have an equivalent to Linux's /proc/self/environ, exposing a ...
1
vote
1answer
375 views

Are there any test cases to ensure the “web-attacks.rules” snort file works correctly?

I have set up an free evaluation Confluence Server on my local host and have configured "snort.conf" to point to my localhost as "HOME_NET" environment variable. I tried to test the ICMP rule by ...
4
votes
3answers
849 views

Create a page to experiment with SQL injection [closed]

This semester, I have taken a course on Information Security and my project for this course is to implement an SQL injection to obtain admin privileges. For this I first download Havij software ...
1
vote
1answer
190 views

uninstall and reinstall after hacking [closed]

My computer has been hacked. If I uninstall and reinstall do I loose my files? The facebook tech tried to sell me a number of pkgs ranged $149-$299 and told me that my account was hacked as was my ...
3
votes
3answers
354 views

Is this a web attack I should be concerned about - trying to enter code for form vars

I have a created a simple CGI script running on a web server where a user can login using a username and password. The username and password are entered via a html form and the form POST's the data ...
17
votes
2answers
2k views

How can vending machines be hacked? And how can I prevent it?

I am developing a vending machine and want to make it secure. In a comment to my previous question, @Polynomial said "Vending machines (and similar devices) can often be pwned via buffer overflows on ...
7
votes
3answers
1k views

Can you extract memory contents from a hibernated Windows machine?

In a recent discussion about hardware hacks, attacks surrounding Windows hibernate popped up. I am not entirely convinced that it would be viable to get stuff out of the memory saved to disk. When ...
5
votes
1answer
256 views

Cufon or Prototype as an attack vector for Blackhole exploit kit?

I've been asked to look into the security of a client site that's apparently throwing antiviral messages when visited. Specifics: It's being detected as a Blackhole exploit kit inside of a Cufon ...