27
votes
4answers
13k views

Are there technical disadvantages in using free ssl certificates?

Note this question is related, except this one is about free SSL certs. There are providers who are offering totally free entry-level SSL certs (like StartSSL). I was wondering if they are ...
2
votes
2answers
3k views

Any reasons to why not use randomize_va_space?

I've been looking a bit into kernel options for hardening, and there is one that seems to be a good idea to deploy - randomize_va_space. But before I activate that feature I started a google search, ...
8
votes
6answers
3k views

How do RSA fingerprints protect from MITM attacks?

I understand that RSA fingerprints are used to verify that you are really connecting directly to who you want to connect to, and not someone else posing as that site. Like when you do a git push, it ...
18
votes
2answers
10k views

The inner workings of iMessage security?

This is a very interesting article about the iMessage technology used in Apple's very popular communication devices. So far, there has not been much technical details released by Apple. Hopefully ...
3
votes
3answers
297 views

Why should every file have a user and a group?

I've been reading in most hardening guides for linux, that you should check for files and directories without valid user or valid group. What I can't find, is how this could be used for an attack, or ...
7
votes
3answers
690 views

How useful or beneficial is participating in CTF contests for my security career?

Yes, there are already some great questions and answers about CTF contests on StackExhange Security. But before I go down the rabbit hole of comparing all the CTFs out there, trying to find a team to ...
5
votes
3answers
234 views

Best way to handle identity theft incident?

A user's email is hacked, contacts copied, and similar emails (look alike emails with minor spelling differences) are created by the attacker with the same name and avatar, sending relatively well ...
1
vote
1answer
262 views

Is proper documentation on .xef files available anywhere?

WinACE encrypts files (using one of its 8 methods) into a file with the extension .xef. I'd want to see some documentation on this file format but I couldn't find anything... I'm particularly ...
7
votes
5answers
5k views

Is there a reason to protect SIM with PIN?

If the phone would be stolen then the SIM card will be thrown out by thieves just after the theft so that they can't be found. If the phone would be lost then it will be harder to find an owner for ...
6
votes
3answers
9k views

Do you need to encrypt session data?

I came across a session management class in PHP which encrypts session data in the session storage folder (i.e., /tmp) and can be decrypted later in your script using a key. I was wondering if it's ...
12
votes
8answers
7k views

How to safely view a malicious PDF?

I have a PDF with important information that may contain malware. What would be the best way to view it?
16
votes
6answers
9k views

Finding a specific malware sample for malware analysis purposes

I wish to analyze the changes made by a specific virus. For example, Win32.Sality. Where can I get the sample of this, or other similar, malware for testing?
7
votes
3answers
540 views

How secure is HTTPS with weak ciphersuites?

Today I came across the website https://mtgox.com/, which claimed to be secure because of the Verisign certificate. I checked the certificate out of curiosity (it's the first thing they claim, let's ...
7
votes
4answers
536 views

Should SMS systems warn users of possible spoofing attacks?

The author of this blog post Never trust SMS: iOS text spoofing says that: The sender of an SMS message may provide arbitrary sender information using low level protocol features. Furthermore the ...
42
votes
4answers
9k views

Why aren't application downloads routinely done over HTTPS?

We all know we should be using SSL whenever we collect passwords or other sensitive information. SSL provides two main benefits: Encryption: The data can't be read by a middle-man while in transit. ...
-1
votes
2answers
125 views

Should I use salt to authenticate data?

I have a client and a server. The client makes a request containing userId, cardId, position (on the card) A hacker could just do the same http request with the next position. So I think about ...
-3
votes
1answer
159 views

What do I need to worry about when moving from a compromised system to a clean one?

As a result of a targeted attack, my computer was compromised? What should I be worried about when trying to move to a new system and prevent reinfection? I purchased a new clean computer and am ...
4
votes
2answers
8k views

How to make / dump contents of memory for forensics analysis?

I work as a Information Security analyst and was recently tasked to look into Incident response + computer forensics related topics. For starters, I am experimenting on my PC which is running Windows ...
5
votes
3answers
775 views

How to store chat conversations on my website?

I am making a site where members are able to have one-to-one chats, and I'm not sure how should I process conversation texts. Should I store the text in a .txt file or directly in a database? I also ...
5
votes
3answers
396 views

What steps can you take to make offline cracking of SRP harder?

In the aftermath of the Blizzard hack, what steps can I take to make offline cracking of SRP more difficult? My question assumes that your database is already gone and that you implemented SRP more ...
16
votes
1answer
919 views

What is a “Trailing Host Header”, and how can I test for it?

My team's been doing some research into WAF protections based upon a WAF testing tool released at Black Hat this year. In the tool, there's a list of hostname evasion tests - that are really just an ...
5
votes
3answers
2k views

How do I improve the physical security of a rack cabinet?

I've got an 8U 19-inch server rack cabinet with two locks - one on the front panel, one on the rear panel. The locks are small cam locks, but the cam part is rather thin and flimsy-looking. I could ...
1
vote
2answers
2k views

SQL Injection tool (Mac OS X) [closed]

Do you know any software for searching (analyze) SQL injection (on website) from Snow Leopard ? I have found some that can run from Linux or Windows. I understand that most Linux (console) ...
-3
votes
2answers
1k views

Cheap, Foot-in-the-door certifications? [closed]

Could you recommend cheap certifications to get your foot in the door of the industry.
6
votes
4answers
421 views

Automating Social Engineering Prevention

Being an advocate for DIO (defensive information operations), I have always been concerned about social engineering and its relation to server security. Giving administrative access to staff members ...
2
votes
2answers
198 views

E-mail Server Security

In recent news, Bitcoinica was compromised by an e-mail server infiltration. The hacker then applied social engineering, using one of the administrative e-mail accounts to reset the root credentials ...
4
votes
4answers
2k views

SMS Authentication: random OTP or a cryptographic one

I'm adding two-factor authentication using SMS to enhance an existing login process. Since I'm not working with physical tokens, I was wondering what is considered the safest: Sending random 8 ...
4
votes
1answer
188 views

How does my antivirus determine which CTL is used?

I have imported a trusted root certificate into the Windows local machine list. This works fine with my signed certificates, unless my AV (Bitdefender Antivirus Plus 2012) is set to "scan SSL", in ...
2
votes
3answers
1k views

Firewall Migration: NetScreen NS500 to FortiGate [closed]

I have recently been tasked with doing a firewall migration from an old NetScreen NS500 box to a FortiGate device (I believe it will be a 60C). I am sure most of you aware that NetScreen boxes are no ...
6
votes
6answers
4k views

Does having a minimum number of digits improve password security?

Some password systems will enforce at least X of a type of character - a common one I see is 'minimum 3 numeric characters'. As far as I understand, simply allowing certain character classes, like ...
13
votes
4answers
808 views

How to convince your boss about importance of IT security

Do you know how could I make my security complaints/advices more effective? Or How could I convince my boss about IT security? There are a couple of known good practices in the field of IT security. ...
3
votes
0answers
115 views

How to find rogue access points? [duplicate]

Possible Duplicate: Tracking down a rogue access point Rogue access points can pose a threat, when employees connect to them. What are some techniques that can be used to find these ...
3
votes
5answers
2k views

How can I know if my PC is getting infected?

I have installed an antivirus, but as no antivirus is perfect, what can I do to diagnose if my PC is getting infected? For example, keeping a close eye on what programs and tasks run when I turn my ...
2
votes
1answer
296 views

Who are these crazy referrers?

In my web pages' IP logs, I have recently begun seeing some very strange referrers, like this: http://haddies.4t.com/tramadol-hcl/tramadol-hcl-200mg.html ...
4
votes
4answers
193 views

When should police be notified about host intrusion?

If an attacker gains unauthorized access to a host, or makes unauthorized modifications to information on that host, is it appropriate to contact the police or some other law-enforcement agency? In ...
3
votes
1answer
857 views

When a company asks to test physical security, what are some techniques one could use to gain entry?

When a company asks to test physical/infrastructure security, what are some techniques one could use to test employees? This could include good excuses to gain access to some hardware/software.
1
vote
3answers
213 views

What would be a good way to guarantee security of theft and loss of sensitive data in a shared rack?

Two of my servers are in a shared rack, we secure them by adding frontcovers to the machines. The DC is always recording with a camera when one of the shared racks is opened and they write down what ...
1
vote
2answers
196 views

How to educate users about the dangers of social engineering?

What would be the best way to teach and test employees on the topic of social engineering? What topics would you include?
-1
votes
1answer
3k views

How to hack linux from phpMyAdmin? [closed]

I got the username and the password for phpMyAdmin, and i am trying to hack the operating system "linux". i tried to create an payload.php file which is a pyaload taken form metasploit. i encoded the ...
2
votes
1answer
197 views

Is Creating a Restricted Database User in Microsoft SQL Server Decent Protocol

Forgive me for the heavy metaphor but it's a situation's complexity kind of goes over my head. Assume I'm Leonard Shelby (My short term memory only lasts 5 minutes). I'm a freelancer that reads ...
3
votes
2answers
499 views

How to mimic an emotion?

Microexpression is a brief facial expression according to emotions experienced. It is also one of the most powerful SE (social engineering) weapons. However, they are very hard to master. Are they ...
5
votes
3answers
507 views

Security risks using tmpfile() for sensitive data in PHP

What are the primary concerns when storing sensitive data in PHP's temporary directory via tmpfile()? For instance: Could this data be recovered from HDD by a malicious admin? Could the admin easily ...
-5
votes
1answer
932 views

How to exploit a windows server when you have read-only filesystem access [closed]

I found a vulnerability in a site that can allow the download of any file of the server. I tested it by succesfully downloading boot.ini and autoexec.bat. I have no access to source code or file ...
12
votes
5answers
5k views

When registering for most websites, why do you need to confirm your email address?

I'm working on a site which allows users to sign up for a service. They choose a username/password, enter their personal details, etc and proceed into the site, their details being stored for future ...
16
votes
3answers
924 views

Risks of Mullions in High Security Areas

I have a storage space full of information assets. The room itself is sound; there are no windows, the walls go all the ceiling, and there is only a single entrance with two good stout doors and high ...
12
votes
3answers
8k views

What is reverse social engineering?

What is reverse social engineering? Is it something different from normal social engineering?
15
votes
6answers
14k views

How secure is FileVault 2 while the computer is in sleep mode?

How secure is Apples disk encryption FileVault 2 when someone has physical or network access while the computer in sleep mode or is running a screen saver? Are there ways to circumvent FileVault 2 ...
10
votes
2answers
719 views

AMD64 overflows and null bytes

In the past, I have managed to overflow my own vulnerable programs, and those of others, but only ever in a 32bit environment. Every time I try even a simple stack smash on a 64bit machine, I run into ...
3
votes
4answers
1k views

Asymmetric crypto: Decrypt own messages without having private key

I have built a messages system for my website. Users can send the admin messages which are stored in the DB after being AES-encrypted. I think that using asymmetric crypto (RSA through openssl) ...
5
votes
1answer
246 views

Use token for Windows Server 2008 AD RMS [closed]

I have a Windows Server 2008 configured for AD RMS (Active Directory Rights Management Service), another Windows Server 2008 machine that is the domain controller, and a third machine that is a member ...

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