prevention of an attack vector (e.g. XSS, HPP, CSRF)

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3
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1answer
217 views

Vim Modeline Vulnerabilities

I use vim and have a use case for modelines. A modeline means that vim will parse a textfile for lines like: # vim: set someoption=somevalue and will then set those options. This is awesome if ...
6
votes
3answers
588 views

How dangerous is it to use CSS styles from an untrusted source?

I'm a moderator at a forum. We want to have a new style for the forum. We're thinking about announcing a competition to the users to come up with the best CSS design; we would adopt the best ...
5
votes
2answers
1k views

How eavesdropping will be performed how can I prevent from eavesdropping

I believe that eavesdropping in a man in middle attack and the message is passing from the client to server the man sitting at ISP or network hackers can look at what message I am sending. Heard that ...
2
votes
3answers
224 views

How good is validating source with request.referer than checksum?

I have 2 portals(both are under my control & domain names are different) In 1st portal, there is a link on click of which User can directly get logged into 2nd portal. Link which will be hit in ...
11
votes
3answers
291 views

What are the pros/cons of using a threat detection system?

What are the pros/cons of using a threat detection system for a web app (like OWASP's AppSensor)? What does a properly implemented threat detection system do and how does it behave when it detects ...
0
votes
1answer
68 views

How to specify a Snort rule connection duration?

Is it even possible to specify into a snort rule the duration of a connection? For example: in this format Hour, Minute, Second H, M, S = 0, 2, 1 If a connection that has the duration of 2 minutes ...
3
votes
2answers
339 views

What is the disadvantage of using spoofing protected version of ARP protocol

I read this article about man-in-the-middle arp poisoning and how it works , it seems that arp poisoning programs exploits the fact that ARP protocols trusts any packet to be true and modify its ...
2
votes
1answer
427 views

External network DNS spoofing

I've been thinking recently if its possible to DNS spoof an external network. Let's say for example you are attacker.com and your victim is of course victim.com. Then I've thought of 2 scenarios: 1. ...
6
votes
4answers
563 views

How can Antivirus differentiate between a Trojan and a normal remote desktop application software?

RAT (Remote Access Tool, e.g. Sub7) are considered malicious by Antivirus software. How can it distinguish between such patches and a client application for commercial software like NetSupport ...
13
votes
3answers
583 views

What prevents people getting charged over NFC in crowded places?

I don't have an NFC-enabled device and I couldn't find any information about this in Google. What is it that protects me against an attacker with a portable NFC terminal charging payments by just ...
3
votes
2answers
105 views

User privileges for unsanatized code

We all know there are still vulnerable code out there even though they may or may not get exploited and found for hacking attempts. I've seen people do it countless times and have a possibly plausible ...
1
vote
1answer
74 views

How non-executable are implemented? [duplicate]

In the "Hacking the art of Exploitation" its said that the basic idea of stack overflows attacks is that the operating system can't differentiate instructions from data inside the stack ,and the ...
2
votes
3answers
86 views

Prevent request forgery attack

I don't know if I used the term correctly but basically this is the scenario: I am working at an application witch on every computer install must make a request to a server notifying the server that ...
12
votes
2answers
285 views

Why do browsers allow public websites to attack intranet sites?

When I'm visiting a website on the public internet, the website can cause my browser to send requests to a local IP address (such as 10.0.0.1). This can be used to attack internal web sites, e.g., ...
18
votes
3answers
5k views

DNS Amplification DDOS attack

During the weekend I made some tests to simulate an DNS Amplification DDOS attack. sending about 90Mb/s traffic I was able to generate about x.x Gb/s amplified traffic which sent our datacenter ...
8
votes
1answer
1k views

Experience with a recent DDoS attack on Apache

I originally posted a question here since I was not familiar with an actual distributed denial of service attack (DDoS) on my server. I noticed that my server is very slow in responding to HTTP ...
5
votes
2answers
6k views

How can I detect/withstand DNS amplification attack?

I am a developer, and I am trying to get an insight into what could I do to enable my application to withstand a DNS amplification kind of attacks. Would such prevention methods help against DOS type ...
1
vote
2answers
295 views

How to stop a (malicious) endless loop

Few days ago someone tried to crack my site using a Remote File Inclusion attack. The attack was blocked by my Web Application Firewall, but I was curious about the file. So I downloaded it started to ...
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votes
1answer
1k views

How to find bugs/ vulnerabilities in web apps/sites? [closed]

What knowledge is needed? What software is to be used? How are the reports written? PS: Websites like facebook.com
2
votes
2answers
236 views

Will using SSL to secure Wordpress admin area only still actually be secure?

The vast majority of our website contains no sensitive information, logins, forms, etc. However there are portions driven by wordpress so we are looking into getting SSL to secure these areas. There ...
0
votes
1answer
567 views

Sanitizing JavaScript to prevent XSS

I'm going through a vulnerability remediation exercise for a client and am trying to figure out how to best mitigate this particular hole. There's a script on our site that calls up content into a new ...
3
votes
2answers
188 views

Defense against same origin attacks?

The Question: How do I, as the victim, protect my site from being manipulated into doing something it's not supposed to, on a shared host? Same-Origin policy looks the other way. Most convenient ...
22
votes
3answers
2k views

Does overlaying the mouse on a virtual numeric keyboard really protect against keyloggers?

I just saw for the first time a new way to enter a password, at the Banque Postale (French Bank). You are given a virtual numeric keyboard and to type you can just leave the mouse cursor over a number ...
2
votes
1answer
104 views

Where can I find articles about identity disclosure attack?

Where can I find more details about identity disclosure attack and it's prevention? If the adversary tries to steal the identity of an individual like mobile patterns and start appears in various ...
33
votes
4answers
4k views

Should I change the default SSH port on linux servers?

Is there any advantage in changing the SSH port, I've seen people do that, but I can't seem to find the reason why. If you have a strong password and/or a certificate, is it useful for anything? ...
3
votes
2answers
3k views

HTML encoding to protect against XSS

While going through some references about protection against XSS i found that it is a good practice to encode data (entered by users) before using it to generate a dynamic page. I was not able to find ...
3
votes
2answers
498 views

Is there a reliable way to simulate “Evil Maid Attack” boot path tampering when using bitlocker?

Suppose you have a system whose OS drive is encrypted with bitlocker and uses TPM + PIN authentication to authenticate the boot path against tampering. As I understand it, this setup theoretically ...
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votes
1answer
684 views

Solutions to TCP FIN Host Sweep (Signature 3032)

The Intrusion Prevention System is giving me an attack with signature 3032, TCP FIN Host Sweep on one of the ip addresses. I need a solution or recommendation on how to avoid the TCP FIN Host Sweep.
39
votes
6answers
11k views

What techniques do advanced firewalls use to protect againt DoS/DDoS?

It is hard to protect a server against Denial of Service attacks, DoS/DDoS. The two simple ways I can think of is to use a server with much resources (e.g. CPU and memory), and to build the server ...
3
votes
3answers
2k views

How to detect & prevent fake emails?

I hope This not same as this one E-mail can be made to appear like it came from a big organization? I'm not asking how to protect a brands & and large organizations (Google , yahoo, etc ..), ...
1
vote
1answer
711 views

CSRF with OAuth or Bearer Authorization headers

I am designing a RESTful API which is to be accessible from a web browser. The API is protected by Basic authentication. I understand the concept of CSRF, and the mitigations proposed (I found both ...
2
votes
2answers
464 views

CSRF Login: can Attacker Login using valid credentials?

Considering this picture: taken from here:page21 Is this possible? If so, How to prevent it?
5
votes
3answers
491 views

Why must all classes' data members be set to private?

In OO programming courses, teachers always tells us to set class members to private unless there is a good reason because it is more "secured". How does setting members to private makes the program ...
4
votes
2answers
607 views

when to escape user input

I wonder when is the best way to handle escaping user input. Two options come to my mind 1) User sends data to server we escape it and then store it into database 2) we store data as it is and ...
13
votes
6answers
4k views

Why is ARP poisoning killing all network activity?

Using ettercap and ARP poisoning, I was able to eavesdrop on other connections, but suddenly I was unable to make any connection to the Internet. To restore Internet connectivity, I had to restart my ...
3
votes
3answers
405 views

is it safe to allow external images to be attached to Blog or any Web content?

I am filtering all images that attached to any content of my blog: Check for file extension. Check content type using $finfo = finfo_open(FILEINFO_MIME_TYPE); I also save the image temporary on my ...
2
votes
3answers
1k views

How dangerous is game guard?

Game guard is an anti-cheating application used with MMORPGs . I have read that such applications acts as rootkit over the pc. How dangerous it is to play MMORPGs that uses this application? How ...
0
votes
2answers
157 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 ...
2
votes
4answers
630 views

How password hashing is useful in MITM attack?

Even though I read a lot about hashing and how passwords are protected, I am still confused about it. If passwords are hashed at client side, it will be useless because it can be sniffed and used by ...
4
votes
4answers
814 views

How to prevent attacks against client side validations?

I have a login form where am accepting Mobile Number of the User for login. When Mobile Number is submitted, am calling a JavaScript to validate the Mobile Number. My client side validations ...
19
votes
2answers
621 views

How is “<scrscriptipt>” or “selselectect” used to avoid filtering?

A technique for avoid filtering of common words is the one I described in the title. However, why does this technique work? SELECT isn't the same as SELSELECTECT for example.
1
vote
1answer
187 views

Compromised server with psyBNC - what are our next steps?

One of our VPS servers has an install of psybnc on it. The install has been present for quite some time, and has now been brought to our attention. We have backups, but they also have psybnc on them. ...
4
votes
2answers
241 views

FrameBusting script

It is commonly known that loading your site inside a frame on another site, can potentially expose your site to all kinds of ills, and in general is not a good idea if you have any sensitive data to ...
16
votes
4answers
8k views

What is the correct way to implement anti-CSRF form tokens?

I am fully aware of CSRF and have already implemented some safe forms, but I have never been happy with the results yet. I've created tokens as a md5 of username, form info and a salt and stored it ...
4
votes
4answers
297 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 ...
6
votes
2answers
286 views

Safe YAML parser?

I've recently read that YAML was not "designed to handle malicious user input", because a malicious YAML input "can create instances of all classes defined in the targeted Rails application". ...
1
vote
1answer
110 views

Guidelines on out-of-band server management via integrated Lights-out services (iLO, iDRAC etc.)

Several CVEs (CVE-2012-3271, CVE-2011-4158, and earlier) point out vulnerabilities in remote server administration firmware; what are the guidelines on hardening this extremely useful component of ...
1
vote
2answers
698 views

How is iptables useful to prevent attacks against a LAN?

I need some advice securing a LAN using iptables. I've found lots of examples on how to secure single host with iptables, including scanning ports, attacking using ICMP-flood and TCP-flood. These ...
4
votes
2answers
377 views

How effective is changing the MAC address?

Since every vendor has a MAC address range, and Apple has network card models that only they use (Airport), I suppose that it is very easy to identify a network package as coming from an Apple device, ...
19
votes
5answers
1k views

Designing in zero day attack mitigations

What are best practices / recommendations / strategies for mitigating zero day threats/attacks from a software development perspective?