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

learn more… | top users | synonyms

4
votes
4answers
84k 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 ...
4
votes
4answers
456 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 ...
4
votes
2answers
353 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 ...
4
votes
4answers
1k views

Is this an attack and how can I fix it?

I don't know where to start in searching the forum for existing threads that might cover my issues. I recently received a spoof email pretending to be from a client for whom I've just started to do ...
4
votes
1answer
4k views

Are passwords stored in the cookie? encrypted?

Whenever I connect to security.stack.exchange, I am automatically logged in. I haven't allowed the browser to store my password. When I delete all cookies stored by the security.stack.exchange, I have ...
4
votes
2answers
494 views

Are there volatile memory chips which dont retain data after power off?

It was demonstrated that dram modules can retain information up to 10 min after power off in certain conditions. My question - are there memory types which will retain data 10 sec at max even if being ...
4
votes
5answers
153 views

What are attackers trying to achieve when doing attacks on local programs such as buffer overflows?

In attacks on programs, such as stack buffer overflows, what is the objective of the attacker? I’m having trouble learning the technical details of the attack (such as overwriting the function’s ...
4
votes
4answers
614 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 ...
4
votes
2answers
1k 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 ...
4
votes
5answers
403 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 ...
4
votes
3answers
231 views

Should user input be validated for it's length?

Is it bad not to validate length of user input to text field at server side. May it lead to such vulnerabilities as buffer overflows and other? I think it depends on programming language of ...
4
votes
4answers
1k views

What are the chances of a database being hacked?

How often do websites (and their databases) get hacked? Hacked as in user accounts stolen, tables flushed, and all in all, damage done to the database. I'm talking about e-commerce websites, and ...
4
votes
2answers
306 views

XSS when <, > and " are escaped

I'm pentesting a website that has a reflected XSS, or at least a vector for a reflection, but the issue is the following : It escapes <, >, " to their URL entities (not &, ) or () You are ...
4
votes
4answers
267 views

Attack where browser URL appears valid

I remember reading about an attack where the "location bar" in a user's browser displays a valid URL (e.g. https://www.paypal.com/), but the traffic is really being directed to or intercepted by an ...
4
votes
3answers
2k 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 ...
4
votes
2answers
723 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 ...
4
votes
3answers
253 views

Most informative DEF CON talk?

I didn't make it to DEF CON this last year... I'd like to know what you thought was the most interesting/informative presentation and possibly a link to more information on the topic. [mod - ...
4
votes
1answer
163 views

What is a sequential injection attack?

From the Financial Times 26th October 2015 "TalkTalk faces mounting calls for compensation" Then, the hackers downloaded customer data using a “sequential injection”. Cyber security experts say ...
4
votes
4answers
953 views

Can public keys be a security risk when performing password-less SSH logins?

Some companies use monitoring software such as nagios or icinga. In order to perform checks on the servers, they often need password-less SSH logins. The servers being checked put the public key of ...
4
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) ...
4
votes
1answer
1k views

How to prevent CSRF if you want to include Flash plugins in your form like Uploadify in your form?

What is CSRF? I need a basic definition that is not just lifted from Wikipedia. I understand SQL injection, XSS, cookie poisoning, but I just cannot wrap my mind around this. I am using a ...
4
votes
3answers
254 views

Passwords propagation, Password Trend and Word Generator in Human Mind

Some passwords like "123456", "admin" are outrageously popular, so are the leet transformations and concatenation of digits. The users seem to pick up the password suggestions or just copy the ...
4
votes
5answers
191 views

Online Shop got hacked, fixed but is still under attack - what to do?

an xt-commerce-based online shop from a friend of mine got hacked recently. The attacker mailed that the shop is vulnerable, he showed the extracted data (basically he dumped the databases and cracked ...
4
votes
3answers
1k 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 ...
4
votes
2answers
342 views

Are cars with keyless proximity-based entry protected against range extenders?

Some cars unlock whenever the key fob is within a certain distance. Do such systems generally guarantee the maximum distance in a secure fashion (namely, by requiring the fob to respond within a ...
4
votes
2answers
174 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 ...
4
votes
2answers
1k views

Help investigating potential website attack (URL rewriting and ROT-13 obfuscation) [closed]

We're looking for help/advice from website security experts. Our company develops web-based process management software and hosts it for our customers. The software sends emails to users when they ...
4
votes
1answer
544 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 ...
4
votes
1answer
203 views

Computational Feasibility of finding 'Good Links' of the following format

I recently stumbled upon this and am checking here to see if what I am proposing is indeed feasible and can be considered a breach of privacy. For obvious reasons I am not revealing the website ...
4
votes
2answers
233 views

Most secure response for a server to return to a user scanning for exploits

I have ASP.NET servers hosted in IIS, regularly i see bots attempting to scan my server searching for outdated versions of phpMyAdmin, mysql etc. Currently these requests all return 404 because ...
4
votes
1answer
94 views

What kind of attacks can target static resources?

Static resources and their caching interests me from the security perspective. Let's say we have an .jpg file requisted from the origin -> going through a reverse proxy with caching -> reaching the ...
4
votes
2answers
190 views

How to securely install software on Ubuntu?

How to install a software like Sublime Text on Ubuntu 14.04 LTS and mitigate against a MITM attack? There is a PPA available, but the PPA must be added manually. I don't see any PGP keys or MD5 ...
4
votes
1answer
145 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?
4
votes
3answers
157 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 ...
4
votes
4answers
319 views

Famous XSS attacks over JavaScript [closed]

I'm about to graduate in "Computer Science", and I'm writing thesis about the Javascript vulnerabilities. In particular, I'm analyzing the JS vulnerabilities that allow XSS attacks. I would like to ...
4
votes
2answers
186 views

Connected cars: Skills needed for a security specialist [closed]

Connected cars are being mass produced by many car manufactures such as Audi, GM, Honda and Hyundai (Founding members of the Open Automotive Alliance). Recently I have read a scaring article about ...
4
votes
1answer
71 views

How accurate the recent activities location provided by Microsoft emails

One of my emails is on hotmail.com provided by Microsoft. Recently, after few suspicious incidents where my computer was hacked and many other accounts, I changed all my passwords including this ...
4
votes
2answers
74 views

What's a term to describe multiple shoulder surfing attacks to uncover different parts of the password?

Is there an existing term that describes shoulder surfing attacks where the adversary observes a different part of the password each time, to eventually construct the whole password? An example ...
4
votes
2answers
437 views

Can a MitM attack occur on an ISP's local exchange or street wiring cabinet?

If an attacker were to dig up the 'outgoing feed' from my local exchange or the street cabinet, could they sniff my entire neighborhood's network traffic? Or is this infrastructure secured against ...
4
votes
2answers
2k views

How to use attack trees and attack graphs

I am trying to understand how attack trees\graphs can be used in the security process. I read a lot of papers presenting the topic and how this reppresentation can be useful, but I really don't ...
4
votes
1answer
331 views

Is my server being used as a proxy or being attacked?

I have an Ubuntu, Apache, Passenger, and Rails 4 project on AWS EC2. I am a beginner full stack developer and I am unfamiliar with the security and server side of my project. Recently, my site was ...
4
votes
1answer
479 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 ...
4
votes
1answer
272 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 ...
4
votes
1answer
204 views

DOS safe alternative to delay response to an attacker with sleep()?

tl;dr sleep() costs my servers resources. Using it to delay response to the attacker might cost him/her time, but allows for DOS. Is it possible to keep him/her waiting without costs of mine? Long ...
4
votes
1answer
70 views

Antivirus constantly detecting tmp files as threats

Recently my antivirus has been constantly detecting threats and it's always tmp files. I delete maybe 50 of these files each day. A few days ago it detected a trojan. Last week it detected many ...
4
votes
1answer
254 views

Use of JavaScript by LastPass to encrypt & decrypt the password database a secure approach?

LastPass is a top-rated password manager that comes as a browser extension and uses a master password to encrypt and decrypt the password database using the JavaScript. Is this a secure way of doing? ...
4
votes
1answer
370 views

Attacks against HIDS software running on the same machine

I am interested in the attacks that could be used to compromise or disable HIDS software such as Tripwire or Samhain. I understand that ideally checks should be run periodically and the database ...
4
votes
1answer
240 views

Security risk: Digitally sign communications for SMB

I have a computer (Windows) on a network where an industrial process is controlled. There is an option in Local Security Policy >> Local Policies >> Security Options >> "Microsoft network client: ...
3
votes
2answers
828 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?
3
votes
3answers
581 views

Is there an attack that can modify ciphertext while still allowing it to be decrypted?

Is there any way an encrypted file using AES-256 could be modified without alerting the file owner, ie., so it can still be decrypted with the same key? I know that without an initialization vector ...