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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56 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 ...
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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 ...
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2answers
113 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 ...
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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 ...
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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 ...
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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(...
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1answer
109 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: ...
0
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1answer
113 views

What type of attack can bring a website down by serving a redirect loop?

My website has been up for a year and all of a sudden is down with a too many redirect message. www.jdmxchange.com (classifieds for modified cars/parts) I tried to use fiddler to see if it was ...
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1answer
74 views

Oversized XML attack in axis 1.4

How can we prevent oversized XML attack in webservice implemented with Apache Axis 1.4?
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1answer
56 views

What is a transient attack?

I just faced a problem of an IP is taking forever to respond, i had been told it might be a transient attack.... I tried googling it, but cant really find more info. Can anyone kindly explain to me ...
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0answers
38 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 ...
3
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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 (...
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0answers
152 views

Is the process Wslxrqjet.exe, tagged 'Google Chrome', malicious?

Multiple instances (between 3 and 15) of this of this process Wslxrqjet.exe are running on my Windows 8 system at all times. Windows Task Manager 'Description' field for all instances is "Google ...
2
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0answers
279 views

Older Cell / Smart phones were susceptible to bluesnarfing / bluetooth attacks, Why specifically are smartphones secure from this attack now?

Older cell / smart phones were susceptible to bluesnarfing / Bluetooth attacks, Nokia phones in particular. But now in days, modern smart phone and cell phones that use Bluetooth technology for ...
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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 ...
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0answers
62 views

Encrypted Malicious Traffic Database

I was working on a little research project to correctly identify the encrypted traffic pattern generated by various tools/applications for example metasploit (or increase the success rate). I have ...
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0answers
58 views

How to find which domain in my VPS triggered a DDoS attack with WP xmlrpc

Today, my data center suspended my VPS for DDoS attack reasons. They say one of my clients, that has WordPress website, started a DDOS attack to another websites using xmlrpc. But I don't know which ...
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0answers
103 views

What is an Origin Error Attack?

Similar to my previous question here, however I thought it was best to ask two separate questions rather than combining them into one. From The Forrester Wave™: DDoS Services Providers, Q3 2015 ...
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0answers
127 views

Buffer overflow and register contents?

I am doing an exam practice question, suppose I have a function like; void func(char* arg) { char buf[32]; strcpy(buf, arg); } command break func: -buf begins at 0xbffebfb0 -(gdb) x/2wx $...
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0answers
159 views

How can I launch DHCP starvation attack in WLAN?

In WLAN, due to MAC association on Access Point (AP), I can't send the DHCPDISCOVER messages using random MAC addresses. But if I keep my original MAC address as the source ethernet MAC a and random ...
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0answers
1k views

How Modification attacks works?

Theoretically... In Active attacks we have "modification attack"...ie "In a message modification attack, an intruder alters packet header addresses to direct a message to a different destination or ...
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0answers
109 views

Example of a hacking attempt that failed because of a bug?

We hear all the time in popular press (and increasingly, in government publications + scholarly articles) about how "cyberattacks" make us insecure, because we have so many vulnerabilities (mostly ...
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0answers
135 views

Anyone seen weird messages in their logs?

I've been reading over the logs on my honeypot and discovered the following messages that seem to be either gibberish or a cypher message: kernel: v0 neigfradn tt kernel: [2108296.63083] devc nt nee ...
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0answers
238 views

How to avoid cloaking attacks?

A few days ago, we found a lot of web pages on Google with the name of our web sites, for example http://website.com/public/our_agency_name.asp. Every day we find more of this kind of URL. Looking ...
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0answers
182 views

How does an attacker authenticate to a service using just the hash of the user (after performing a pth attack)

Let's say the attacker got the username and the password's hash. How can he use it when authenticating to some service in its domain with NTLM , for example? How can he send the request as the ...
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0answers
3k views

Whole system ACK flood attack making internet slow

Over the past few days, I'm noticing that the log of my wireless router is showing an ACK flood attack from various IP addresses. I use a D-Link DIR-600L. I've searched through the internet, also ...
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0answers
5k views

Linux Hydra issue - random correct password success

I have an issue with Hydra when I use it. I have tried the same command lines given in guides directly supported by the Damn Vulnerable Web Application (DVWA) v1.8. Ok so.. here is my attempt output....
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0answers
12 views

DMZ with Reverse Proxy for both Web and Email servers

I have both a web server and email server, instead of placing these two "public" servers in the DMZ, instead In the DMZ I was going to place a Reverse Proxy. for the Web Server: Firewall accepts port ...
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0answers
39 views

Firewall source and destination IP validation

For an external firewall interface, why is it a good idea to validate that the source IP address was initiated from an internal IP, or why it originated from an external IP? If, hypothetically, the ...
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0answers
30 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 ...
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0answers
44 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 ...
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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 ...
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0answers
61 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 ...
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0answers
56 views

Prevention of sinkhole attacks

I have read about many approaches to launch and detect sinkhole attacks in wireless (sensor) networks. Yet I couldn't find any (good) articles to read about the prevention/avoidance of sinkhole ...
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0answers
30 views

Is there a way for someone to block an email from reaching its recipient?

I don't know if this can be done with people who can email spoof your contacts but I've been noticing that my emails just aren't getting to where it needs to go. In the same vein, I also don't get ...
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0answers
89 views

SSH attempt blocked now ECDSA keys changed

Last night I had an external IP tried to access my server over SSH. The attempt was blocked as it failed to authorise in the number of times and time limit that I'd specified. Doing a whois on the ip ...
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0answers
63 views

CPU instruction encoding on x86 that is free from ROP attacks

x86 has a dense instruction encoding, and thus enables ROP attacks. Are there any CPU instruction encoding schemes that are free from these attacks?
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45 views

Behaviour of DNS query packet

When the configured name server resolver is not reachable, the query packet will retransmitted after certain t times (in windows, every 1 seconds until 8 seconds,max). The behaviour of the legitimate ...
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0answers
51 views

Possible to run snort without modifiers?

Is there anyway (e.g some command line argument) with which we can tell snort to run and perform detection but without caring for the rule modifiers if there are any ? e.g alert tcp any any -> ...
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0answers
329 views

Victim loses Internet connection during MITM attack

I tried to do MITM attack on my network. I enabled ettercap, marked my router as TARGET1 and my second computer as TARGET2. Then I enabled 'ARP Spoofing'. I do not know why - but after this operation ...
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0answers
212 views

The simplest way to emulate TCP-IP protocol violation / anomaly attacks

Reading up upon security on web applications I did not found that much info on TCP-IP and in particular HTTP/UDP protocol violation / anomaly attacks. My question: What is the general mechanism of ...