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

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3
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1answer
682 views

challenge-responce and man-in-the-middle

Is man in the middle attack possible in a typical challenge-response based authentication? For a typical reference one can go through this paper. My question is that is it possible for an intruder to ...
3
votes
3answers
4k views

Facebook spam / phishing attempt?

I got this sent by a friend on facebook and i dont think its a genuine message ___ shared a link on your Wall. This will leave you speechless) ...
3
votes
2answers
8k views

Disabling windows firewall remotely

i use metasploit for pentesting windows 2003 sp2 server but when windows firewall is on i am not able to perform pentest successfully is there any way to disable firewall remotly?
3
votes
3answers
354 views

PHP IP check as security?

Would just like some input on a PHP script I'm writing. It's just a simple script that only myself should be able to access. I don't have a dynamic IP address, so this isn't an issue for me, but I'm ...
3
votes
2answers
112 views

WHOIS Contact Details Abused

The system for the internet and the way people can abuse it is getting worse and worse. I am having several issues with people abusing the information within my WHOIS, which if I remember is protected ...
3
votes
1answer
99 views

Force user to download a file to their hard drive via hyperlink?

I want to design a scenario in which I have a web site which contains a link. If the user clicks on this link, it will save a file in a specific pat in his hard disk without his consent. Is this ...
3
votes
1answer
412 views

What steps need to do to identify security hole

I use VPS hosting. Installed CentOS 6 and ZPanel according to this tutorial http://www.zvps.co.uk/zpanelcp/centos-6 Received warning from hosting provider: This URL has been identified as a phishing ...
3
votes
2answers
1k views

If a login/session cookie is stolen,does changing the password void it?

Considering the scenario where a Gmail session/login cookie is hijacked or stolen and it is discovered my means of Gmail last account activity,will changing my password immediately void the cookie or ...
3
votes
4answers
3k views

Is there a method to detect an active man-in-the-middle?

Suposing an attacker that has gained access to the router. Is there a way, for the victim, to notice that is being attacked? I think one of my friends is a victim of this kind of attack. How can I be ...
3
votes
2answers
2k views

SMS / voice call interception with a fake base station

This answer to a similar topic describes in a detailed way how vulnerable SMS and voice calls are in terms of decryption. In order to do so, an attacker needs to set up a fake base station located ...
3
votes
1answer
208 views

How to get informed in metasploit when a user does a reverse shell to my computer

I sometimes do reverse shells on metasploit but I'm not sure when my target will actually execute the payload. I would like an alarm of some sort to tell me when he does. this can easily be done in a ...
3
votes
1answer
173 views

SSH MITM attack underway

UPDATE: The source of this problem has thankfully turned out to be a buggy mobile SSH client used on 2 different devices not a MITM attack. However, I'd still appreciate a full answer to the original ...
3
votes
1answer
233 views

Odd user registered and strange behavior. Is it sinister?

I am running a number of web sites. They are all Drupal based, if that is relevant. Recently I have noticed something odd. All my sites have a user registered with the name "zctonglin". I presume ...
3
votes
1answer
365 views

Can JavaScript defeat source port randomization?

Can malicious JavaScript defeat source-port randomization in browsers? I am reading a research paper which seems to claim that the answer is yes: many browsers seem to always assign a random ...
3
votes
1answer
104 views

SSD Self Encrypting Drives - Setup / warm boot bypass

I've seen folks deploying the SED on laptops recently. I've discovered that there is a setting in which you can do a warm boot and NOT require the bootup password to be put in again. Which makes ...
3
votes
1answer
119 views

How is Cross Site Flashing performed?

I read about cross site flashing in the OWASP testing guide. I know the difference between XSS and XSF. But what I am looking for is how attackers perform a XSF attack. How is it possible since there ...
3
votes
1answer
256 views

De-auth attack Reason codes and possible reaction

I am learning about Deauth attacks and how they work. I see that the Deauth frame has a reason code which indicates the reason for the deauth. I have tested the attack with aircrack-ng and this reason ...
3
votes
1answer
294 views

Can I perform WEP cracking from several laptops against 1 AP

I have successfully being able to perform WEP key cracking attack using aircrack tool. I want to allow my students to test this in a lab environment. They will be working fro their own laptops against ...
3
votes
2answers
1k views

Blocking incoming traffic from privileged port (< 1024) to mitigate DNS DDos Amplification attacks

Hope someone can clarify. As I understand, in a DNS DDos Amplification attacks Multiple DNS queries are sent to a vulnerable name server with the source IP spoofed to that of the target server. The ...
3
votes
1answer
140 views

Why would an attacker try to guess random email usernames on a small domain?

My mail server has recently come under a very bizarre attack. Every five to ten minutes, a new IP connects to SMTP, attempts to try weird usernames (like pil, bennett, netscape, msfuser, desktop, ...
3
votes
1answer
147 views

Vulnerabilities of having one path of app accessible only via HTTPS but others via HTTP?

Imagine example.com that is accessible via HTTP and HTTPS. Most of content at site isn't secure and it won't be bad if it will be read by attacker. One of paths - example.com/secure_zone is accessible ...
3
votes
2answers
780 views

ICMP redirects and source routing in the wild?

Theoretically, ICMP redirect messages (IPv4 and IPv6) and source routing (IPv4) / routing headers (IPv6) are very dangerous. However, I'm curious as to if attacks using these features really work in ...
2
votes
2answers
731 views

Can Poodle be fixed in SSLv3 or will it go the way of TLS compression?

Is TLS_FALLBACK_SCSV going to be the fix for servers that wish to keep SSLv3 enabled? If not what actions are being taken, if any, that address the vulnerability besides disabling SSLv3?
2
votes
4answers
61k views

Is Teredo in my router a back door?

I use the school computer, which I bought from school, administered by the IT-department. I opened a port to my computer when I stumbled upon this: It points to my computer IP. (I have a static IP ...
2
votes
2answers
357 views

Is it a weakness to be able to see server side scripting?

Are languages such as Cold Fusion and PHP less secure because they are embedded in HTML which is sent to a client? Someone told me they are less secure because they lack abstraction. CLARIFICATION: ...
2
votes
2answers
626 views

NX bit: does it protect the stack?

I once heard the NX bit was a panacea, then that it was not. One detail I've wondered about though: Does the NX (no execute) bit protect against code inserted into the stack and executed there? It ...
2
votes
3answers
2k views

Javascript containing a long hexadecimal string and eval: is this suspicious?

At the bottom of the index.php file for a simple “contact us” form, I found the following (some whitespace and newlines added): try {if(window.document)--document.getElementById('12')} catch(qq) ...
2
votes
5answers
5k views

Efficient way for finding XSS vulnerabilities?

Manual (reliable) way: Put string containing characters that have special meaning in HTML into some parameter of HTTP request, look for this string in HTTP response (and possibly) in other places ...
2
votes
2answers
5k views

Sniffing, Snooping, Spoofing

Could somebody please explain me the differences between the following attacks? sniffing snooping spoofing My professors used them all in his documents, but I'm not sure, if those are 3 ...
2
votes
2answers
2k views

SUN Remote Procedure Call Port 111 [closed]

I have found on my machine port 111 is open. This is listed as RPC. I understand there are possible attacks on this port. How can my machine be attacked if port 111 is open? How can I secure this ...
2
votes
3answers
6k views

Can you tell if your computer was hacked and pictures stolen from 2-6 months ago?

Can a home computer, not wireless, be hacked from the outside and have pictures copied? Can I track and see if that happened?
2
votes
2answers
7k views

Kernel Intrusion on home broadband router - what does it mean?

My home broadband connection has been up and down all day, I took a look at the router logs and saw the following: Mar 27 12:22:30 kernel: Intrusion -> IN=atm1 OUT= ...
2
votes
2answers
835 views

I ran a netstat on my server and port 80 is listening, does that mean it is open and vulnerable to attacks? [closed]

Sorry I am just getting into Web Development and trying to learn more about servers and PHP, so I downloaded the LAMP stack on an Ubuntu14 OS and started an apache2 server. tcp6 0 0 :::80 ...
2
votes
2answers
228 views

Why would Tor not be vulnerable to this easy-sounding attack?

I'm thinking of this attack on Tor, which I'm sure won't work, as it is much too simple. Mr. Blackhat sets up lots of intermediate nodes. However, whenever TCP connections come in, they are given ...
2
votes
5answers
241 views

Methods used to reverse a hash

I know that a hash is a one-way-function and that therefore there isn't a reversal function. By reversing a hash I just mean to find some plaintext that gives the hash. I think that I understand that ...
2
votes
2answers
194 views

How secure are the GPG/PGP keyservers?

Importing a GPG key with a KeyID or fingerprint seems to rely on keyservers. Doesn't this invite man-in-the-middle attacks, in which someone would alter the keys to allow them to decrypt the data? ...
2
votes
3answers
1k 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.
2
votes
2answers
326 views

Can an attacker slow down my server without compromising it?

We have a Linux server with WHM/cPanel which has been running without problems for almost 3 years now. Yesterday, the server became unresponsive (it was definitely there though) for around an hour. ...
2
votes
2answers
187 views

What are stolen passwords used for?

Say there is a line of business application which has username/password datatable in the DB. Personal email address is not stored, and usernames are assigned by an administrator. Someone gains access ...
2
votes
1answer
346 views

Need assistance diagnosing hacked website

Despite all my work to harden my website, someone has managed to hack it. When loading the homepage in IE8, the page appears to load normally. Then, the status bar briefly displays a request to a ...
2
votes
2answers
1k views

Some questions about penetration testing distribution Backtrack 5

I know just the basics of backtrack and I want to ask some questions about it: Can you attack an ftp server using backtrack? an email server? I have a Centos virtual private server and backtrack is ...
2
votes
5answers
303 views

Is it possible for an attacker to change my sent emails content before arrival?

I have a web application that sends "change password link" to user that wants to changhe his password. The link is something like this: http:// ...
2
votes
3answers
286 views

Insert string to memory with null character

I'm trying to implement return-to-libc, here's the code void func(const char *str) { char buf[4]; strcpy(buf,str); printf("you entered [%s]\n",buf); } int main(int argc, char *argv[]) { ...
2
votes
1answer
360 views

Bypass va_randomize_space and stack-protector

Is a program compiled with the GCC -fstack-protector option and running in a Linux environment with the va_randomize_space kernel variable set to 1, totally protected against buffer overflow attacks? ...
2
votes
1answer
862 views

How does Binding Images with Malicious Patches happen?

Well I don't know if this technique is still used, but about 5-7 years ago it was a popular way to deliver a malicious patch (Sub-7 , bifrost etc ..) to a victim. There used to be a program that ...
2
votes
2answers
396 views

Attacks surrounding /etc/hosts/

Although /etc/hosts/ is a file that comes up a lot in security, I am surprised to find there is no discussion here on this forum that describes how this can be used for an attack. Thinking about it, ...
2
votes
3answers
4k views

How should I defend against TightVNC brute-force attacks?

How should I defend against this type of attack? This is a tightvnc logfile excerpt from a linode cloud server running Ubuntu 12.04 (Precise) with the ubuntu-desktop package added to the bare server. ...
2
votes
3answers
215 views

hiding javascript in image

I have read a post in thehackernews and searched the net to find how it worked. How can anyone add javascript in an image such that when the image is displayed it can run a script. Can this be done ...
2
votes
1answer
322 views

Can malicious phone software mount a MITM attack on a phone call?

Suppose my smartphone has been compromised and there is malicious software running on it. You can assume that the malicious software has broken out of any sandboxes and is running as root. If I'm on ...
2
votes
2answers
2k 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 ...