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

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4answers
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Is it possible to block specific users that connect to the internet behind of same gateway with NAT?

Assume there are two internet users (A and B) that connect to the internet from the same gateway by using NAT. That means they use same IP address while passing through our firewall. Now assume we ...
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1answer
107 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 ...
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2answers
410 views

Someone logged on my Centos VM; Can they attack the host OS?

I'm using Windows 7 and decided to learn Linux Administration (Centos 6.4) using Oracle VirtualBox to host the Linux system. In my network configuration I choose "Bridged Adapter". I set the VM's IP ...
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1answer
246 views

List of social engineering hacks and defenses [closed]

Sorry if this question is absolutely stupid or irrelevant, but I can't help but ask. I am just curious about different approaches hackers take in social engineering attacks, and clever examples of ...
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1answer
562 views

Clear the DNS server's cache?

Is there anyway for the attacker to clear the cache of a DNS server in order to poison it? For example, if someone attacked my DNS server in an attempt to spoof Google.com, they will receive the ...
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1answer
492 views

Are there Bluetooth attacks on Smartphones that will not notify the user of the attack?

Are there Bluetooth attacks on Smartphones that will not notify the user of the attack? Specifically forcing a reset or opening an application.
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1answer
352 views

What are security risks of serving user uploaded files without Content-Disposition?

Imagine a server that serves untrusted user-provided files and allows other users to download them. Under some circumstances server can be tricked to return responses to download file requests without ...
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1answer
229 views

SNMP trap by legitimate program?

Is there any way to tell if this SNMP trap is something created by a legitimate program? Update: Hex Dump 0000000: 30 82 00 ec 02 01 00 04 06 70 75 62 6c 69 63 a4 82 00 dd 06 82 00 09 2b 06 ...
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1answer
5k views

How to use http-get-form in THC-Hydra?

I've been messing with Hydra (Brute Force) to solve the "Damn Vulnerable Web App" brute force section but the problem is when I use http-get-form it said: Warning: child 1 seems to have died, ...
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1answer
2k views

How can log poisoning be successful with a Local File Inclusion attack?

I just read a paper about Local File Inclusion on exploit-db.com, it can be found here. One technique with LFI is log poisoning as you may know already. You do an HTTP GET request that contains PHP ...
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1answer
283 views

Information on the phpMyAdmin probe?

Various IP addresses call various domains looking for various paths that might lead to PHP My Admin/scripts/setup.php One of those IP addresses is 74.63.212.48 which I just now found out I could ...
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0answers
108 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 ...
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0answers
57 views

POODLE vulnerability in Safari

I have been trying to mitigate POODLE on client side in my organization. I disabled SSL3 in most browsers but couldn't disable it in Safari. Apple released a Security Update 2014-005, which, ...
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1answer
60 views

Attack using weird characters followed by some javascript in a URL?

I'm seeing a very weird attack this morning from a pile of VPS instances spread out across the US. The URLs look like this: /js/bundles/,!0):this.element.propAttr( ...
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0answers
48 views

Backdooring vulnerable lighttpd installed on wireless AP [closed]

I have an AP at home and I'm trying to secure it as much as I can. I found an bug by accident. My AP has 3 ports opened: 22/ssh 53/dns 8081/blackice - icecap What I found is that my port 8081 ...
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0answers
50 views

Kerberos v4 replay attack vs. sliding time window

Just wondering about a replay attack against Kerberos v4. So v5 has a replay cache that takes note of tickets to prevent replay attacks. Kerberos v4 does not have a replay cache, though. Say, I ...
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0answers
77 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 ...
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0answers
106 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
336 views

Akamai or Incapsula (or other) for CDN with DDoS Protection? [closed]

One of our clients is launching a new site and I've been tasked with making a short overview of the advantages/disadvantages of Akamai, Incapsula or other CDN providers who are strong with DDoS ...
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0answers
174 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
2k 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
130 views

Disable HNAP on D-Link router

I'm concerned that Home Network Administration Protocol (HNAP) is a serious vulnerability that exposes consumer network routers to remote management by malicious entities such as government ...
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0answers
3k 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 ...
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1answer
504 views

Are there any test cases to ensure the “web-attacks.rules” snort file works correctly?

I have set up an free evaluation Confluence Server on my local host and have configured "snort.conf" to point to my localhost as "HOME_NET" environment variable. I tried to test the ICMP rule by ...
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0answers
262 views

Unauthorised Perl Scripts [closed]

One of my servers just had the memory exhausted by a load of Perl scripts, we use plesk and they seem to have appeared under the /var/www/vhosts/domainexample.com/cgi-bin/ directory, I managed to stop ...
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3answers
2k 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?
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1answer
745 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 ...
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3answers
162 views

How to retrieve a site whose server is running Linux

I'm struggling to find a way to retrieve through Google a list of sites having Linux as their server operating system. Actually, I'd like to be able to test the following command: nmap -O ...
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1answer
551 views

Is this Ubuntu server configuration secure?

I'm new to Linux and security matters. I have a vps with Ubuntu 12.04 server and I wonder how secure this server is. I set up ssh passwordless login and disabled ssh login for root. I update security ...
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5answers
155 views

Are most MiTM attacks done to impersonate web sites, or simply decrypt traffic?

The more I read about impersonating web sites the more I get confused. Does an attacker need the private key of the server in order to impersonate a website or does having the private key simply give ...
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4answers
128 views

More specific name for an inside attack

I have a scenario where I evaluate two different types of attacks on a distributed network of nodes (you may also call it a multi agent system). On the one hand the attacker is able to read incoming ...
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2answers
162 views

When MBR pirates grin as an indication of absolute pleasure!

Someone, have no idea who, really worked my computer, and placed some rootkit, all-knowing, all-smashing malware something and I simply cannot keep Windows OS clean in a multiboot configuration with ...
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1answer
107 views

My Control Panel and online IP addess tools report different results for my IP address [closed]

Control Panel says it's 192.168.1.1; Google, whatismyipaddress.com etc. says it's 75.92.141.32 When I put the IP address reported online in my address bar I get a Nokia login page, but my ISP is ...
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3answers
131 views

Unknown hijacker/popups on the browser

I was cleaning my father’s laptop which was recently infected by a fairly tenacious piece of malware. It hasn't given any great clues as to what it is named or anything of that sort and thus far ...
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1answer
147 views

Real-time Operation systems and attacks

I'm interested on kind of attacks which can be used on 'Industry Control Systems'. I only have found that following malwares: switching-off/disablement the systems stole the information What ...
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2answers
84 views

Prevent a file from being encrypted

Is it possible to prevent a file from being encrypted, or at least being easily decrypted in case of encryption? For instance; with the Crypto Locker malware attacking users, could you set up a ...
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2answers
439 views

DNS Cache Poisoning as a Foil to SSL

I recently learned a bit more about DNS cache poisoning, and my understanding of the basic way it works is by editing the DNS cache so that when the victim types in, say, www.google.com they get the ...
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3answers
769 views

Elaborate Hacking attempt detected - now what?

I am in the process of developing a php/mysql based web application. I took the complicated route and rather than to use a framework or anything I built the entire foundation of my app from scratch. ...
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2answers
161 views

How can I encrypt something user provided without risk of the key being exposed?

So, let's say I have a theoretical service. User has some text they want to encrypt. They pass it to me, and I encrypt it. Then, only I should be able to decrypt it afterwards. Another kicker, it must ...
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1answer
1k views

More information about CVE-2012-0883 vulnerability

I need to have more details about CVE-2012-0883 vulnerability published on : http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0883 Second, I need to know , what mean DSos mentioned on the ...
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3answers
3k views

Demo of web site that is vulnerable to command injection

I'm looking for a demonstration web site that shows an example of a web site that is vulnerable to command injection: where I can inject something and get the web site to run a shell command. (This ...
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1answer
8k views

If a router has port 5060 open, and I know that there is unencrypted SIP traffic going through this port, how could one take advantage of this

Ok so an Nmap scan against an IP address shows that port 5060 is open. I know that 5060 indicates that this is SIP traffic. Also, 5060 indiciates that this is unencrypted traffic, where if the port ...
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1answer
127 views

Fuzzdb detected as Trojans [closed]

I recently downloaded fuzzdb from http://code.google.com/p/fuzzdb/ and my antivirus kept on detecting some of the files as Trojans. I need to know if these files are safe?
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3answers
2k views

What is the hack attempt going on when I see: did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA

When I look at my sendmail logs, by far the most common "error" I see is the following: Nov 22 16:49:50 MyHostname sendmail[18832]: rAMMnj2u018832: [IP address redacted to hide the guilty] did not ...
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2answers
377 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 ...
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2answers
97 views

Looking for information about CVE-2006-6876 vulnerability

In order to study vulnerabilities of a SIP server and the impacts of DOS attacks on the QoS of VoIP service, I have found this vulnerability which can be exploited to cause DoS on SIP server. But I ...
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1answer
136 views

why CVSS give a score of 0.66 for a full impact on CIA?

By visiting: http://nvd.nist.gov/cvsseq2.htm I noticed that the CVSS attributes the following impact values ​​for confidentiality, integrity and availability: none : 0.0 partial impact : ...
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1answer
4k views

In Metasploit, how to use a custom exe as payload?

Question was once on a mailing list but wasn't answered. I want to use a custom exe as a payload in metasploit. For example when I use exploit/multi/browser/java_atomicreferencearray and want to ...
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1answer
98 views

Open source alternatives to tamper data

I'm developing a browser(firefox) plug-in which essentially checks for malicious input. My current approach is to store all input fields sent in GET/POST requests, try to heuristically determine ...
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1answer
50 views

Context-dependent attacker

In the context of the following statement what is meant by context-dependent attacker? The MySQL Client contains an overflow condition in client/mysql.cc. The issue is triggered as user-supplied ...