An attempt to exploit a weakness in a system, either for nefarious or research reasons. Questions with this tag should be about designing, carrying out, or defending against the attack itself, rather than about the underlying weakness.

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0
votes
3answers
418 views

What service could penetrate my Firewall via UDP on Port 17275?

Has anyone monitored various requests from all over the world on Port 17275 via UDP? My firewall logs show huge amounts of such requests from lots of different IP Adresses. I can't find any ...
9
votes
4answers
932 views

How to perform a proper DDoS test in a safe and controlled way?

What is the proper and safe way to perform a DDoS test without crashing the whole infrastructure? What different types of DDoS attacks are there and what things should be considered performing such a ...
2
votes
1answer
81 views

Control flow integrity and data flow integrity

Many exploits nowadays can be prevented by control flow integrity (CFI). However, there are also data only exploits such as Heartbleed, read arbitrary data/keys which can be prevented by data flow ...
1
vote
3answers
62 views

What security measures can stop an attacker to obtain reverse shell even if a victim clicks and downloads a malicious exe file?

I am doing some hands-on training with Kali linux and one of the exercise I came across was to make an exe file containing malicious payload(say to obtain reverse shell), send it to a victim and hope ...
45
votes
2answers
8k views

Is this an attempted SQL injection?

Looking through error logs I found lots of requests to a web-app where the URL contains: /if(now()=sysdate(),sleep(10),0)/*'XOR(if(now()=sysdate(),sleep(10),0))OR'"XOR(if(now()=sysdate(),sleep(10),0))...
7
votes
6answers
1k views

RDP Attempts From Unknown IPs, How to Protect?

I'm running Windows Server2008 R2, and seeing the following error multiple times with various IPs in the event log: The Terminal Server security layer detected an error in the protocol stream ...
0
votes
2answers
88 views

What is the likelihood of a NAS getting hacked? [closed]

I'm looking at NAS (network attached storage) to use as one of several backup storage devices to store my data, since I cannot find a DAS (direct attached storage) with RAID functionality (all of the ...
5
votes
3answers
26k views

What are the differences between dictionary attack and brute force attack?

Can someone explain the major differences between a Brute force attack and a Dictionary attack. Does the term rainbow table has any relation with these?
4
votes
1answer
145 views

JS snippets on my live project do not appear in my code residing on my production server

I have a Django website project that is live (let's call it example.com). It's a forum where users can submit comments and reply to them. It has a Postgresql database, and gunicorn + nginx reverse ...
1
vote
1answer
95 views

s this an exploit attempt and where can I analyse it?

Edited: Never mind the MinGW or .bash_history, I can see that is unlikely. Somebody attacking me and those bytes ending up in the frequently used file .bash_history by accident is not that unlikely ...
0
votes
2answers
112 views

Repeated “Dos Attack” from remote IPs

I've been having some weird issues with a home network, and it seems to me like I have some vulnerability I don't know about. To be honest, though, I'm not a big network/security guy and I kind of ...
5
votes
0answers
36 views

Any historical precedent for Open-Source libs as an attack vector?

I'm curious as to whether there are any noteworthy cases historically of people deliberately placing exploits in open-source code libraries used by others, either something relatively obvious with the ...
2
votes
2answers
12k 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= MAC=34:08:04:00:08:35:18:80:f5:...
1
vote
2answers
53 views

Why are primes reused in Diffie-Hellman key exchanges?

Reading about the Logjam attack, I learned that Diffie-Hellman exchanges often* rely on the same particular 1024-bit key. I understand that back when DH was invented, even 512-bit keys were considered ...
0
votes
0answers
29 views

Proper way to document and log brute force attacks when creating a user account

We have the following use case: Users can self register for a business account by filling a validation form with their ID, first name, last name, and DOB. ID is something that only the user knows ...
0
votes
1answer
55 views

Following strategy using DDoS mitigation service - UDP bandwith exhaustion attack from spoofed IPs

I need to defend against receiving a massive spam of UDP packets from random spoofed IP addresses. I would make it this way: In my protocol, every UDP packet contains username and password. Firewall(...
8
votes
7answers
3k 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 details....
0
votes
2answers
125 views

How to deal with UDP bandwidth exhaustion DDoS attacks?

I am building a service, which will use UDP. It will run on Amazon AWS - in the firewall they provide, I can block everything except that one UDP port my service will run. The only thing I'm ...
7
votes
4answers
2k views

Adding “Email or Username” in login page, is safe?

Suppose a website has a login page with "Email or Username", and shows the username publicly to every user on that site. Does that make it easy for an attacker to hack other someone's account?
0
votes
0answers
43 views

How does an attacker compromise a soft switch?

Speaking of soft switches (e.g soft switch in data plane of software defined networking). I've been trying to find a good research paper or article that explains how an attacker can compromise a soft ...
2
votes
3answers
81 views

Necessity of physical access to air-gapped computers

In an intriguing paper Fansmitter: Acoustic Data Exfiltration from (Speakerless) Air-Gapped Computers (also see this summary) the authors demonstrate that they are able to exfiltrate data from an air-...
12
votes
2answers
46k 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 ...
0
votes
0answers
24 views

PTK Security without Anonce and Snonce

Is the creation of the PTK still secure if it omits the Anonce and Snonce? My guess is, no, it is not secure anymore, it would be vulnerable for "replay" attacks maybe anyone can explain in a few ...
2
votes
4answers
166 views

it is possible to make some wifi router out of service without have the connection password?

Lets say i want to make some WiFi router out of service. I can connect to the router and close the WiFi connection or change the password. But in this case i need to have full access to the router. ...
13
votes
8answers
3k views

Facebook account keeps getting hacked, can't seem to figure out why or how?

One of my friends, she has a lot of friends on Facebook, and uses it for marketing. Her account keeps getting broken into. Her password gets reset and/or gets locked for changing resetting password ...
15
votes
7answers
3k views

Can hackers detect my operating system?

I've seen people demonstrating the use of backtrack to attack VMs. In one of the components of backtrack, it shows the operating system of the targets. Since support for Windows XP is ending soon, i ...
85
votes
5answers
10k views

Can simply decompressing a JPEG image trigger an exploit?

The novel Daemon is frequently praised for being realistic in its portrayal rather than just mashing buzzwords. However, this struck me as unrealistic: Gragg's e-mail contained a poisoned JPEG of ...
7
votes
1answer
333 views

What is the name for this type of URL attack?

Say a PHP page accepts URL path as a POST parameter (like the answer to this question): $path = $_POST['url_path']; file_get_contents('http://example.com' . $path); A maliicious user POSTs ...
26
votes
5answers
30k views

Can I detect a MITM attack?

Based on this question here: Are "man in the middle" attacks extremely rare? Is it possible to detect man-in-the-middle attacks, and if so, how would one go about it? In addition, what if ...
3
votes
0answers
67 views

security of libgcrypt when cross-compiling for windows?

Looking at libgcrypt, specifically secmem.c it seems that it does not account for windows-specific memory handling (e.g. VirtualLock) and in fact there is a very troubling comment: #elif defined (...
4
votes
2answers
665 views

Facebook iOS SDK Authentication

The Facebook iOS SDK only needs your bundle & app IDs of your iOS app to match those of your Facebook app. If I find out an app's app ID, can't I just create another iOS app with that app's ...
3
votes
2answers
532 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. ...
0
votes
1answer
49 views

Grabbing ChaCha20 key from ram

There are various other posts which talk about grabbing a key from ram such as http://electronics.stackexchange.com/questions/198274/storing-a-secure-key-in-an-embedded-devices-memory How would you ...
2
votes
3answers
6k views

How to search for evidence of Camfecting (webcam hacking)?

I'm worried about camfecting (webcam hacking). The camera light on my mac (running OSX) is not on, but it isn't hard wired so that doesn't say a lot. I've ran a virus scan but no signs. Now my idea ...
2
votes
1answer
85 views

How to find out if my MBR has Evil Maid code?

If Truecrypt Bootloader will remain visually the same, how can I find out if it was infected?
2
votes
1answer
338 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. ...
76
votes
1answer
9k views

What is this kind of low-intensity, non-hacking attack on a web service?

I am seeing for about 10 days now a bunch of EC2 machines (about 30, distributed in all regions) which are attacking a server of mine. The interesting (or uninteresting, I do not know yet) fact is ...
4
votes
0answers
88 views

Attacks on wifi router, don't know what to do or if I should be concerned [closed]

I'm wondering if these attacks are something to worry about, or just my router being a router. [DoS attack: ACK Scan] attack packets in last 20 sec from ip [60.221.xxx.xxx], Friday, May 06,2016 21:12:...
3
votes
1answer
109 views

Why POODLE vulnerability has for each byte a probability of 1/256 to get it in plaintext?

I read the Google paper about POODLE vulnerability (https://www.openssl.org/~bodo/ssl-poodle.pdf) and a lot of other articles. Each paper/article wrote about that you have to try it in average 256 ...
5
votes
1answer
82 views

Is rowhammer comparable to faults caused by radiation?

As far as I know, both rowhammer and radiation based fault injection, can cause arbitrary bit flips in the memory. Are there any differences in matters of possible outcomes of both "attacks" on ...
1
vote
2answers
133 views

XSS vectors in img src and background-image url

I'm a little confused about XSS vulnerabilities when serving img.src and background url. From what I understand, the only way to execute javascript in this case, is to use javascript protocol. Let's ...
8
votes
3answers
125 views

Can a TCP connection be terminated by an attacker if SSL/TLS has been used to protect data in the TCP segment?

I understand that SSL/TLS is built on top of TCP. That is after a TCP connection is established, an SSL handshake can be started. When it is completed, all communication will be encrypted and ...
30
votes
1answer
3k views

Server attack with \x01

I notice from my server logs that there have been a number of requests like [01/Jun/2016:07:47:58 +0000] "\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\x01\...
5
votes
3answers
990 views

Is this a symptom of an attack (DoS/DDoS)?

I work for an e-commerce website in my country and this is the second time we suffer an attack. At least, looks like one. We have a search functionality in our website and the supposed attacker is ...
1
vote
0answers
35 views

Simulation vs Formal Analysis of Authentication Protocols

I received a review for my journal paper in which we proposed WOOlim or nspk kind of authentication protocols. We proved the strength of our protocol with rigorous formal methods using CSP and rank ...
0
votes
2answers
245 views

What can I do about being heavily port scanned?

I have two devices connected wirelessly to my Linksys router while running Symantec Endpoint Protection on my computer. A few days ago I started using the internet by connecting the cable directly to ...
1
vote
2answers
176 views

Strange 'agetty' process running on my VPS.

Recently, I had to reinstall one of my VPS servers (again), due to malware. I took what I considered to be pretty good security precautions. I also locked the root account and am using sudo as well. ...
0
votes
0answers
60 views

Why isn't ettercap working

I am working on an ARP poisoning/browser redirection project with Ettercap but even if I follow all the steps right it still doesn't work. I tried disabling firewalls too. What I do is: Start ...
0
votes
1answer
75 views

Why is a DNS Amplification attack considered a DDoS attack?

My understanding is that a DNS Amplification attack involves sending a DNS resolver a bunch of requests with a spoofed sender address, which is the victim's. The DNS responds to this IP address with a ...
0
votes
1answer
108 views

Is Qt framework is under attack or it has something suspicious (only in free version)

I was trying to download Qt framework. I went to its Official site (I'm sure, I checked in Wikipedia) for Visual Studio. But when attempting to download Qt for Windows, my Firefox shows this message: ...