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

learn more… | top users | synonyms

0
votes
2answers
259 views

Can I read/write canary values from %gs register?

I would like to know if it is possible to read (or write) the canary values from %gs register. If "yes", how; and if "no", why? Also, I have been reading somewhere that the canary values are stored ...
-1
votes
2answers
145 views

Linux: Blocking outside attempts at attacking computer

in the past when I wanted to block outsiders from attempting to start connections with my Linux machine's various TCP services, what I was told to do was to add this line to /etc/hosts.deny: ...
2
votes
2answers
222 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 ...
0
votes
2answers
133 views

Is it secure if we purchase through a website that is loaded in iframe

I found one of the website is loading all shopping websites in their own domain. Eg . www.domain.com having links like , www.shoppingsite1.com , www.shoppingsite2.com ,www.shoppingsite3.com ...
2
votes
1answer
264 views

How to jam wireless AP?

The first comment under this question states: There are "smart jammer" techniques that are designed to mess with the protocol operations, not overwhelm the receiver with noise (e.g., for 802.11, ...
4
votes
4answers
12k views

How to prevent my website from getting malware injection attacks?

My website was banned as a malware website by Google. When I checked the code, I found out that some code injected many files on my server. I cleaned everything manually, edited all files on my server ...
7
votes
5answers
10k views

How to trace a DDOS attack on a dedicated server and block it?

I have a dedicated server and I'm hosting a game, and the web page (using Apache) for account registering. The server is being ddosed since 8 months ago till today. I've tried to talk with the server ...
8
votes
3answers
1k views

iPhone 5S security: Given someone's fingerprint can I use a 3D printer to create a fake finger with a real fingerprint on it?

With such a big deal being made about the iPhone 5S's fingerprint reader (and formerly the Thinkpads' fingerprint readers) I really wonder how secure it is to use fingerprints in lieu of passwords. ...
2
votes
3answers
236 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[]) { ...
0
votes
1answer
135 views

Can the random keys generated during handshake be guessed

During the handshaking of an SSL connection, the server sends its public key, the client generates a random password, encrypts it with the pk, and sends it back, then the server decrypts it and all is ...
7
votes
2answers
22k views

How do hackers take advantage of open ports as a vector for an attack?

It is widespread knowledge, and therefore a common practice, to close open ports on any machines connected to the internet. If for example, a typical program uses port xyz as it's communication ...
1
vote
2answers
77 views

What is the heapspray technique and how to use it as reliably as possible?

Can somebody explain the different steps to produce a heapspray attack (what are the needed vulnerabilities in the targeted software, what are the limitations of such technique, how to proceed, ...) ...
4
votes
4answers
718 views

VGA/HDMI Based Attack

Can I attack a PC via the VGA port? Is VGA one way or does it accept data from the other side? How about HDMI or DVI? And if so, are there known malware or PoCs to do that? or is it theoretically ...
1
vote
2answers
323 views

What is this for a Request?

i see the following request-string (see complete example below) with the same request_parameters, but differing values, hitting all our sites/wafs. the scheme is always the same: ...
-6
votes
1answer
194 views

Suspicious random IPs requesting image from my server - botnet? [closed]

I've been getting a steady stream of requests for the same logo file from random IP addresses, many of which indicate they're mobile when I look them up. I'm at a loss to explain this. Anyone seen ...
2
votes
2answers
308 views

How to get URL behind REST-style

I've asked same question on StackOverflow but topic passed away with no answers except few comments so I'll try to ask the same question here as it's probably more specific to security. The only ...
-1
votes
1answer
230 views

If someone downloaded 600GB , can that be ddos attack [duplicate]

Last night some one exploit some vulnerability in my site and then upload php script in my images folder . I have the Amazon EC2 server with centos. Now the Hacker downloaded 600GB and increased my ...
1
vote
3answers
377 views

Text changing virus

Can malware change words that I have typed and then saved in the computer'? If so, how likely is this?
2
votes
1answer
782 views

How to find the pharmacy hack in a Joomla website?

We've discovered today that our Joomla website has been hacked by a pharmacy trojan. It was difficult to discover because most users don't see it when visiting our website. One user reported about 2 ...
2
votes
1answer
275 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 ...
1
vote
1answer
801 views

Extremely big HTTP chunk size

I am working in a project which we must count HTTP response size. I am getting chunk size like: crlf = g_strstr_len(chunkeddata , responceSize - responceHeaderSize, "\r\n") And than I had a ...
0
votes
1answer
103 views

Finding the method of attack [closed]

My server has been repeatedly attacked in the last few days. Here's the observations: The ISP server traffic monitor shows the incoming traffic goes up to 300Mbps (with no outgoing traffic), and ...
10
votes
7answers
756 views

Cheating or service disruption by altering client-side code

A reasonably white-hatted hacker has demonstrated the ability to insert text of his own choosing into the communication between a java applet and a web based server. Not a simple MITM attack, but ...
2
votes
3answers
1k 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) ...
0
votes
1answer
202 views

Suspected of hacking Windows 7 SP1 [duplicate]

Hi.I have Microsoft Windows 7 SP1 on my PC. I have an Ubuntu OS near Windows OS. My internet connection has a proxy server from Iran that monitors our networking and filters some of our websites. ...
1
vote
3answers
212 views

Do obscure image URLs prevent image harvesting?

On a Web site which requires user login, and all content is viewable by any registered user, is there any point in making obscure image URLs like "1mh9cr2m78234bc23-32xy4723nxy12.jpg" to protect the ...
8
votes
2answers
661 views

Slowloris attack?

Could someone analyze this info? We got information that slowloris attack took place. They say (hosting stuff) they have implemented mod_antiloris, is that enough btw? Feel free to share your opinion ...
2
votes
1answer
640 views

Classification of attacks in network specially in Snort IDS

What are the main classification of attacks in network and specially in Snort IDS?! Is it possible to power up the Snort by classifying the attack into for 5 main groups, for example; R2L, U2R etc. ...
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 ...
6
votes
3answers
240 views

Is it dangerous to place ~/ssh/config on GitHub?

I am used to version control most of my dot files and push them to a repository on GitHub. I would also like to add ~/.ssh/config to have an up-to-date configuration on all machines. Could an ...
14
votes
2answers
525 views

Does it make sense to hash a session id before passing it to an advertisement partner?

My company runs a webshop. We work with a partner that gives discount vouchers to our customers after they buy (the vouchers can be used in other online shops) and also gives vouchers for our shop to ...
7
votes
4answers
800 views

Security attacks on PHP web applications

I know about following security attacks on php applications (html,php,js). XSS SQL Injection CSFR Session Hijacking /Fixation Code Injection Remote file injection Should i know about any other or ...
8
votes
1answer
512 views

Is it possible to recognise and prevent MitM attacks on devices which use self-signed SSL certs?

I use both Linux and Windows at work on a large enterprise LAN. The majority of the network configuration is out of my reach. Certain SaaS applications that are hosted locally on the enterprise LAN, ...
9
votes
3answers
871 views

Demonstrating SQL injection on the following

I've got lines in my php/mysql code which look like this: ... $sqlquery = "SELECT price FROM products WHERE 1=1 AND id=".$_POST['id']; ... ... query is executed ... echo $price; As a ...
2
votes
5answers
215 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 ...
6
votes
1answer
391 views

How do I check the code of a Chrome extension to make sure it's not stealing my info?

I've been reading more and more about just how much access browser extensions can have to your data. This is a little unsettling, so I'm curious if there is a way to Vet these extensions and make sure ...
-6
votes
1answer
84 views

Kerberos v4 compromised TGS [closed]

What would happen under the Kerberos v4 protocol if an attacker has compromised TGS and identified the Ktgs key? What would be the outcomes of such an attack?
-3
votes
1answer
219 views

ARP Poisoning effects [closed]

On a normal data exchange of the address resolution protocol (ARP), which steps of the exchange are affected by the ARP Poisoning attack? If anybody would be able to answer this or show me a link ...
2
votes
1answer
142 views

What other place (besides libc) attacker redirect control flow to after an attack such as buffer-overflow succeeded

I am not sure this is a right place to ask this question or not. I want to know in previous or modern type of buffer overflow attack, when the attacker succeeded to overwrite return address, where ...
0
votes
1answer
592 views

Man-in-the-middle attack over an encrypted channel

I learned recently about man-in-the-middle attacks and came up with this question. Let's say we have two computers who try to communicate over the network. Each computer has an encryptor and a ...
11
votes
1answer
365 views

How can an attacker abuse a distributed system?

How can an attacker take advantage of a world where state is eventually consistent and vector clocks are used to settle disagreements? For example, what are the security concerns of using a database ...
-9
votes
2answers
301 views

What are the security risks of pirating video or music?

In the case of pirating multimedia, be it video or music, which problems may be caused by the video or music file itself? Could a video or an audio file be used to spread malware? I'm talking about ...
5
votes
3answers
338 views

How I can prove that SSH attacks are not from my application?

My ruby on rails web application is hosted on Linode. Linode opened a ticket and blamed my Linode server for attacking other servers. The logs revealed that it's a SSH brute force attack which ...
4
votes
1answer
115 views

Security consequence of Javascript hole in an online chat?

For an online chat that allows basic HTML, what happens if they leave an open way for a potential hacker to execute javascript on everyone who is in the chat? What is the worst thing they could do?
-1
votes
2answers
183 views

How do you search for new vulnerabilities? [closed]

I've been asked this question, and I really don't know how would I do it. My answer was to take known vulnerabilities and try to exploit them on a different way, but this is not really a new ...
8
votes
2answers
10k views

Advice on what to do after being hacked?

After running a system scan earlier today, I found that my computer had been infected by a trojan horse. My reason for running the scan was because Windows kept shutting down and then recovering. ...
8
votes
2answers
493 views

Plain Text Password Reset Vulnerability

If I receive an email with a plain text generated password (in response to a password reset request), is this a vulnerability? The password expires after one use, in other words the user has to change ...
2
votes
3answers
5k 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
5answers
4k 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 ...
6
votes
3answers
492 views

Lessen impact of DoS attack on cpu-expensive login?

This is a follow-up to my previous question: Prevent DOS against RSA authentication. This question is also discusses a similar problem: Prevent denial of service attacks against slow hashing ...