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

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7
votes
1answer
276 views

Collision attacks on OCB?

I've been looking into the OCB cipher mode and everything I hear sounds good. I was planning on implementing it. Everything except for this lone voice, that is: Collision attacks on OCB: We ...
22
votes
3answers
5k views

How do DoS/DDoS work?

In the last days one could frequently read about attacks from anonymous and LulzSec against different platforms like Sony or HBGary etc. Yesterday for example they DDoS'ed soca.gov.uk and jhw.gov.cn. ...
20
votes
2answers
886 views

A phone call hack

The other day, I got a call from a relative with an email problem. After a bit more discussion, it turns out that two days previously, a man phoned my relative: stated he was from microsoft; asked ...
7
votes
2answers
301 views

Profiling attackers via adaptive games: “Strange game, the only winning move is not to play”

Use of Game Design to Profile Attackers: Interested in any research that links concepts in game design to security systems in an effort to profile the attacker's identity, motives, skills, etc.; if ...
23
votes
6answers
21k views

Security risk of PING?

I have been told that PING presents a security risk, and it's a good idea to disable/block it on production web servers. Some research tells me that there are indeed security risks. Is it common ...
11
votes
1answer
468 views

Public XSLT & XML playground (with PHP DOMDocument, etc.) Security Risks?

Let's say I want to set up a sandbox or playground in PHP that users can use to create (or paste in) XML and XSLT, then transform the XML via the XSLT (by means of PHP 5's DOMDocument and related ...
2
votes
1answer
355 views

The impact of the Sony attacks on the security industry [closed]

First of all there was the PSN hack, which was compromised due to a vulnerable version of Apache and no Firewall and using a developer console. Then Sony Greece fell due to an SQL Injection attack. ...
4
votes
1answer
319 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 ...
10
votes
5answers
2k views

SQL Injection in a Non-Web Application

Does someone know of a good example of a SQL Injection vulnerability that isn't in a web application? What is the user input for this attack? I am looking for a real vulnerability, not speculation. ...
17
votes
5answers
1k views

How to best defend against Targeted Attacks?

We have seen this attack method grow as part of Advanced Persistent Threats (operation Aurora against Google or the G20 French Finance ministry attacks come to mind) but I have no doubt that even ...
9
votes
1answer
171 views

Long running SMTP session

I recently noticed an SMTP session on my server which started when a remote host connected but never seemed to result in any emails being delivered. I could see that it was probably a SPAM site and so ...
52
votes
7answers
17k views

SQL injection — why isn't escape quotes safe anymore?

Raw SQL When you're writing SQL -- for anything that takes human input really, a lot of things have been done to avoid the injection. Everyone that's heard of SQL injection knows that (I'm going to ...
2
votes
2answers
256 views

What steps can I take to identify what type of compromise of my computer has occured

I got involved in a strange scenario today :-) . Some 'UDPAgent.exe' file/worm/virus was trying to access my collegue's system and the antivirum program was showing that this particular thing is ...
8
votes
4answers
602 views

CAM table attack in 2011?

Today's switches are vulnerable to CAM Table attack? https://secure.wikimedia.org/wikipedia/en/wiki/CAM_Table
2
votes
1answer
3k views

What is an active attack?

Browsing through the site I encountered this Is there a way to negotiate a secret between 2 parties with no prior knowledge? What is an active attack then?
3
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) ...
18
votes
1answer
2k views

Collision rate for different hash algorithms

Is there any collision rate measure for popular hashing algorithms (md5, crc32, sha-*)? If that depends only from output size, it's quite trivial to measure, but I suppose that depends also of ...
14
votes
4answers
334 views

What should I look at in the event of a major vendor suffering compromise with unspecified impact?

The specific example I have in mind here is the breach of RSA in March 2011 where attackers got away with critical information which could be the seed information which is used to generate the ...
5
votes
3answers
799 views

How to use and create attack graphs

I am trying to learn more about attack graphs and how they can be used. I have read a little bit about them from some simple Google searches and believe that they could be a useful tool for work. I ...
5
votes
3answers
554 views

Web server file sniffing

What is it called when a user tries several attempts to figure out the files and folder structure on a web server? For example, the attacker will run http://example.com/test.jpg to determine if ...
0
votes
1answer
152 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 ...
12
votes
1answer
1k views

How to make a report after a ddos attack? what information do I need to write on the report?

In my company, after a DDOS against a server, my employer asked me to make an analysis of the attack and to write down some stuff. What do you think I need to write down in my report? Is there any ...
1
vote
2answers
149 views

I am still logged in using a browser X, can CSRF attack work when I use another (default) browser Y on the same machine?

I am still logged in using a browser X, can CSRF attack work when I use another (default) browser Y on the same machine? Edit Assume the web server has CSRF vulnerability. No hidden token checking ...
9
votes
3answers
902 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 ...
36
votes
8answers
3k views

Should I bother teaching buffer overflows any more?

The students are skeptical that turning off non-executable stacks, turning off canaries and turning off ASLR represents a realistic environment. If PaX, DEP, W^X, etc., are effective at stopping ...
-1
votes
4answers
4k views

SQL injection for a username/password form?

This is how user validation happens on my site: if(!empty($_POST['username']) && !empty($_POST['password'])) { $query = "SELECT * FROM users WHERE username='".$_POST['username']."' ...
12
votes
3answers
1k views

Bypassing Address Space Layout Randomization

How effective is ASLR in preventing arbitrary code execution in a buffer overflow type exploit? How hard is it for an attacker to bypass this without simply guessing where the addresses are?
3
votes
2answers
9k views

Disabling windows firewall remotely

i use metasploit for pentesting windows 2003 sp2 server but when windows firewall is on i am not able to perform pentest successfully is there any way to disable firewall remotly?
7
votes
4answers
839 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 ...
4
votes
3answers
198 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
776 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 ...
13
votes
5answers
2k views

Access to a router's GUI

During a recent visit to a coffee shop, I noticed that they hadn't bothered changing their default user name and password for their router. I realise that someone could log on and be annoying to ...
11
votes
4answers
682 views

What is the risk of a packet being sniffed when travelling over the internet without SSL/TLS?

We all know to use SSL/TLS to stop people eavesdropping on our connection, but how likely is it that an attacker will actually sniff your unencrypted password or cookie if you don't? If we exclude ...
7
votes
3answers
741 views

What prevents this exploit from working (unix SUID)?

If I have a user on a unix system where Im allowed to create new files, what prevents me from downloading an executable file onto that system which is already SUID'ed to root on a different system? ...
69
votes
8answers
127k views

Where can I find good dictionaries for dictionary attacks?

I’m wondering where I can find good collections of dictionaries which can be used for dictionary attacks? I've found some through Google, but I’m interested in hearing about where you get your ...
66
votes
4answers
9k views

Can anybody explain XSS? [closed]

I work programming Enterprise Java applications and do very little web development in 2002. I'm interested in security and like to read articles about it. However, I never fully understand how XSS ...
12
votes
7answers
470 views

UNIX Servers: Possible intrusions or attacks that do not use any of the open listen sockets

What type of attacks are there that do not use open TCP or open UDP ports? Is it safe to assume that no open ports means no remote access? (Excluding the possibility that there is a badware already ...
7
votes
4answers
254 views

Security papers or material focusing on the industrial control systems (SCADA)

Anyone know a good site or a list of resource to start to know issue related to the security of SCADA system ?
10
votes
2answers
653 views

What is a “pre-play” attack?

I understand what a replay attack is, but I keep reading about a pre-play attack. What is it? Is it when someone intercepts an unused message and blocks the sender so they can't finish using it, and ...
12
votes
3answers
807 views

Are there valid reasons for spoofing an address?

This is a corollary to the question Why don't ISPs filter on source address to prevent spoofing?. Are there valid reasons to spoof an address?
17
votes
6answers
2k views

What security risks does IP spoofing bring?

By manipulating the TCP packet and changing the source address one is able to spoof the IP. As I understand it, you will not be able to set up a full handshake by doing this, as you will never receive ...
9
votes
2answers
1k views

Malware known to use port knocking to evade detection by network scanners?

Are there any known cases of malware in the wild that utilize port knocking on a backdoor to evade detection by network scanners?
7
votes
4answers
663 views

Is Stonesoft's “advanced evasion technique” a major problem?

A month ago, Stonesoft (an IDS constructor from Finland) has launched an alert about Advanced Evasion Techniques. With these techniques, they claim to be capable of launching attacks on a network ...
8
votes
3answers
635 views

How does an attacker approach a website?

What is a typical mindset and method of approach? What are they likely to try first? At what point does a novice give up versus an expert? How would an automated attack differ from a manual one?
60
votes
18answers
4k views

What security resources should a white-hat *developer* follow these days?

What sites, twitter accounts, FOSS software should a white-hat code 'hacker' follow these days? Do Include: Late breaking information on new security issues (RSS, Twitter, etc) A website that ...
6
votes
8answers
3k views

Retrieving OSx Keychain passwords

I have a computer forensics style osx login.keychain file that I am trying to find the passwords from. I have a very weak mac which I used crowbarkc on to try and brute force but the horsepower is ...
10
votes
3answers
1k views

If an XML document is not validated as “Well Formed” or checked against a schema, what are the risks?

When processing an XML document in my application, what are the risks? E.g. if it is not "Well Formed" or is not checked against a schema.
72
votes
2answers
17k views

What are rainbow tables and how are they used?

Where can I find one? Is there a pot of gold at the end? How do I protect against them? From the Area51 proposal This question was IT Security Question of the Week. Read the Sep 09, 2011 blog ...
11
votes
3answers
2k views

Is null-byte injection possible in Java filenames?

From the Area51 proposal
3
votes
1answer
96 views

What does the Local exactly mean in CVSS?

CVSS (http://www.first.org/cvss/) provides the keyword local in the base vector. The definition given by FIRST is somehow not so clear for me: Local: Exploiting the vulnerability requires either ...