2
votes
3answers
868 views

Establish a secure channel with mutual authentication given pre-shared public keys

Suppose I have a system whereby parties are identified by their public key (with some pre-selected asymmetric key algorithm). Suppose I have a party PUB1 which wants to establish a secure channel with ...
1
vote
1answer
313 views

MySQL/CGI: password in C source file unsafe?

Is this line bad practice from a security stance? connect = mysql_real_connect(connection, "host", "user", "password", "database", 0, (const char *)NULL, 0); If so, what solution would you use? ...
1
vote
0answers
225 views

AD authentication with high amount of ICMP traffic [closed]

We have an IPS in place and it's constantly triggering ICMP / Ping flood signatures between workstations and AD server; or AD to workstation. I understand that ICMP is used for AD authentication. ...
2
votes
1answer
119 views

Does a hash have more than one possible original message? [duplicate]

Possible Duplicate: Collision rate for different hash algorithms Many hashing algorithms seem to have fixed-length message digest as output. If I compute the md5 hash of two strings: ...
0
votes
1answer
614 views

How secure is AES-128 for Zip files?

Say you have a cryptographically random 8 character long alphanumeric password (A-Z, a-z, 0-9) used to encrypt a ZIP file with AES-128. Can this program: ...
8
votes
1answer
23k views

Wireless client isolation - how does it work, and can it be bypassed?

Many SOHO routers these days support a feature called "wireless client isolation", or similar. What this is supposed to do, in principle, is to limit the connectivity between wireless clients ...
2
votes
1answer
3k views

SSL cert not turning green anymore

I'm running a drupal site and have asked about this issue pertaining specifically to the drupal aspect of it here. I know that the "Green" https url doesn't show up because the cert itself isn't ...
4
votes
3answers
2k views

Securing AES 128 encrypted ZIPs against brute force attacks

How long would it take to brute force decrypt an AES 128 encrypted zip file if the password is 8 characters long in the range of A-Z, a-z, 1-9? Does it make any difference if .NET's System.Random ...
6
votes
2answers
8k views

Internal SSL Certificates?

As a developer I really like the idea of using OpenSSL to get perfectly good, free, SSL certs. Unfortunately, from all the research/analysis I've done so far, it doesn't look like there is any way to ...
2
votes
3answers
1k views

Open Source Vulnerability Scanner

I'm looking for an open source vulnerability scanner that I could install on one of my machines and point to all my others. Ideally, I'd be able to configure a nightly scan where all of my other nodes ...
1
vote
1answer
535 views

What user was this spammer trying to authenticate as?

I have a custom application that monitors and logs a user's SMTP session, and came across this spammer trying to use my MTA as a relay. Is it possible to determine what username they are trying to ...
2
votes
1answer
134 views

Types of attacks outside of AppSec and Vendor-Specific Systems?

I'm reading up on the OWASP Top 10 for helping me defend my web app against common "app sec"-type attacks (SQL Injection, CSRF, etc.). And in a recent question I was prompted to not only use OWASP Top ...
4
votes
2answers
495 views

OWASP Top 10? How about OWASP Top 1000?

Many people are aware of the "OWASP Top 10". I'm wondering if OWASP (or any similar authority) has gone above and beyond just the top 10 most commons attacks and made a larger list (e.g. the "OWASP ...
1
vote
1answer
4k views

How do I use OpenSSL with the Java Keytool?

I believe I understand how OpenSSL works, and I believe I have a good game plan for setting up an SSL server on my private network, but before I go through the process of downloading and configuring ...
0
votes
2answers
602 views

How to safely collect bank account from website?

I want to collect bank account information from my customers on my website. I'd like to do that through a form, then I will download it to a PC, print it, and then delete it from the website. Or ...
2
votes
2answers
2k views

how long does it take to brute force varying encryption standards?

Let's say I want to encrypt information in a database. What would be the best encryption algorithm to use and why. I was thinking AES, since it's widely used as a government standard, but if the ...
10
votes
1answer
424 views

Why can the validity of an SSL certificate exceed the registration period of a domain?

I can understand why one might desire to purchase a certificate for multiple years but I am left wondering why it appears to be possible to obtain a valid certificate for a domain that may have come ...
7
votes
3answers
450 views

How do I test and secure ASN.1 Parsers?

As far as I can tell, .NET doesn't have an ASN.1 parser for reading or writing data built in the framework. This means that any code that creates or verifies ASN.1 data is using a 3rd party library ...
3
votes
2answers
2k views

Do most browsers handle mixed encrypted and unencrypted content correctly?

In Google Chrome, when I go to an encrypted page that contains unencrypted content, I get the following pop-down, which allows me to either load or not load the insecure content, making a clear ...
12
votes
2answers
571 views

How to analyze a rootkit?

The other a friend of mine sent me a rootkit/code he found on a server that was exploited (php cgi exploit). Now I was thinking of having a look at it, but I was wondering if there are some basic ...
-1
votes
5answers
780 views

Looking for something like a QR code that cannot be copied/reproduced

Can QR codes always be copied? I am looking for some sort of QR code or chip that can be readily scanned (preferably via smartphone) and linked to a secure website, but that cannot be copied or ...
2
votes
1answer
169 views

How are AV scanners protecting against encrypted (PGPd) malicious code?

As a user of PGP I worry about receiving a virus that was previous encrypted with my public key, which anybody can get by querying many PGP key servers. What prevents an attacker to target a PGP user ...
3
votes
2answers
132 views

What drives FIPS140-2 compliance?

I guess this questions is directed at Product Managers, but I would be very interested to learn what people in the know think. What are the most common factors that drives FIPS140-2 compliance for ...
2
votes
3answers
1k views

Recompute Rainbow table with salt?

So, as I understand it, you prepend a password with salt before you hash it so that the resulting hash can't be used with a rainbow table to find the original password, as you could if the password ...
10
votes
2answers
4k views

What can an attacker do with a stolen SSL private key? What should the web admin do?

What can an attacker do with a stolen website certificate and key? What should the website admin do upon learning this?
1
vote
1answer
71 views

Are there any FIPS140-2 requirements that apply when boot code is updated in the field?

FIPS140-2 standard specifies the following conditional test to be performed by the cryptographic module if software or firmware components can be externally loaded into a cryptographic module: ...
4
votes
3answers
627 views

How do polymorphic/metamorphic/self-encrypting/self-changing file infectors know if they have infected a file or not?

If a virus rewrites itself for each infection how would it know if it has infected a file or not? If it keeps infecting the same file soon the whole file structure will be corrupt. For example how ...
1
vote
2answers
2k views

HTTP TRACE vulnerability discovered - what should I do

First, why is HTTP TRACE method allowed on a website Isn't it a bad thing for web server or its users' security? Second, when I run the following PHP script via my browser... <?php $service_port ...
2
votes
1answer
2k views

How does small dish satellite secure their signal?

For example how does Direct TV's small plastic cards control who receives the TV signal? How is the signal encoded in a way that can allow future updates without the provider needing a new satellite? ...
5
votes
3answers
2k views

Delivery Failure Notification spam protection?

My domain (example.com) has recently been targeted by spammers who are sending email (somewhere) but forging the sender as random-name@example.com. I have been getting flooded by delivery failure ...
4
votes
3answers
18k views

How can I trace the IP address of person in chat?

Is it possible to trace my IP address when I am chatting with others (with gtalk or Facebook)? If so, how could someone do that?
2
votes
1answer
62 views

Does SGC Support reduce HTTPS security?

Server Gated Cryptography is a legacy technology (implemented by obsolete laws) that allows older browsers to establish a SSL session at a higher encryption. This article says SGC should never be ...
0
votes
1answer
443 views

Can the FiddlerCore library be used for Malware (e.g. MitM attacks)?

I've used the excellent Fiddler web debugging software before and have recently come across the Fiddler Core headless .NET library which gives you all the abilities of Fiddler in library form. It's ...
4
votes
2answers
132 views

Evaluating hosting providers for CC development environment

An organization that develops software that may be subject to security evaluations such as Common Criteria is looking to externalize part of its IT infrastructure, including critical components such ...
4
votes
2answers
923 views

Possible arbitrary file download vulnerability

I am auditing a possible vulnerable piece of ASP code on a Windows environment. The code is as follows: If InStr(strPath, "\Only\Download\From\Here\", CompareMethod.Text) = 0 Then Basicly it is ...
2
votes
1answer
285 views

Are these merchant integration instructions wrong about server-client interaction?

I'm working with a payment gateway that seems to have a fundamental misunderstanding of "clients" and how to protect sensitive data. The integration instructions are mostly about a "redirect" mode of ...
1
vote
1answer
222 views

IPtables - Accept Arbitrary Packets

I've achieved a lot on blocking attacks on GameServers but I'm stuck on something. I've blocked major requests of game-server which it aceepts in the form "\xff\xff\xff\xff" which can be followed by ...
-4
votes
7answers
1k views

Are passwords made up from concatenating a few foreign words better than shorter random characters? [duplicate]

Does it make sense to insert a foreign word into a paraphrase to mitigate against brute force? For example: "pussiMeansCatInEskimo" "caballoMeansHorse" "CatIsGatto" "SalopeMeansBitch" ...
3
votes
5answers
250 views

How can I easily determine if a website security company is reputable?

Is there a BBB-type listing or some other reputable badge I should look for when choosing someone to perform a security review?
3
votes
2answers
11k views

Does portforwarding present a risk to anonymity?

AirVPN by default has all ports closed but allows port-forwarding. I think this is required for P2P. Is this a threat to anonymity (e.g. would the person at the other end of the P2P transmission know ...
2
votes
1answer
2k views

What is the industry standard approach to disable weak ciphers to mitigate vulnerabilities?

Particularly this question is focused for Windows Server 2008 R2. I know the registry can be used to modify particular entries to disable weak ciphers if they are known. I saw this tool: ...
2
votes
1answer
3k views

What are the consequences of disabling ssl v2 and weak ciphers?

It is my understanding that IIS has ssl v2 enabled by default. Also, TLS 1.0, if enabled, allows for at least one known major vulnerability titled "beast attack". If the weak and vulnerable ciphers ...
4
votes
2answers
250 views

Should you label networking equipment? is this a security risk?

Should you label networking equipment? is this a security risk? if we label all the networking devices within our company with its host names are we potentially giving away info that we should not? ...
1
vote
1answer
353 views

What questions should I ask a prospective vendor that handles billing and fulfillment?

My company is currently looking to integrate a third-party vendor into our billing and fulfillment process. The vendor will be assuming responsibility for processing orders in our merchant account and ...
1
vote
0answers
30 views

What is Penetration Testing? [duplicate]

Possible Duplicate: What is the difference between a penetration test and a vulnerability assessment? What is Penetration Testing? When a security professional throws around these words, ...
2
votes
4answers
2k views

Spider Attack from several search engines at once

Hello my server is getting hit by spiders from bingbot, google, yahoo, yandex, and some place in the UK all at the same time crashing it. While I have no reason to think any one person did this, it ...
2
votes
2answers
238 views

How do viruses know if they have already infected a system or done something?

I know some viruses repeat the same actions over and over again with no break, thus grinding the network to a halt. But others "take a break" from there repetitive actions. For example Nimda ...
4
votes
3answers
2k views

What does it mean for a digital certificate to be “signed”?

When someone says that a particular digital certificate (like an SSL cert) has been "signed with a key", what does that imply? Does that mean the certificate simply includes a key that should be used ...
2
votes
1answer
186 views

Inner Workings of Public Key Encryption

After watching this video explaining PKE with tennis balls (interesting), it left me with a few particular questions that I'm having trouble finding answers to: I assume that they keys used to ...
1
vote
1answer
498 views

Purpose and Uses of Root SSL Certificates

I'm trying to wrap my head around the technical inner-workings of SSL and one of the last things I'm choking with is the concept of "root" SSL certificates (as opposed to "non-root"?!?). When and ...

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