9
votes
1answer
914 views

Would it make sense to use Bcrypt and PBKDF2 together?

I've read various opinions about whether Bcrypt or PDBKF2 is a better key derivation hashing method. The answer seems to depend on a lot of complicated factors that are not easy to analyze. Would ...
10
votes
3answers
106 views

What is the term to use when logging an event where a user downloads or prints PHI?

My application logs accesses to PHI. I need to add a log item for things like downloading and printing. Is there a general term that I can use to describe these events? I'm thinking something like ...
9
votes
1answer
22k views

How to spoof a cell phone tower (cell site, base station) — homemade IMSI-Catcher

An answer to a recent question has given me an idea for a school project (security CS program). Also, an active attacker (with a fake base station) can potentially force a mobile phone to use ...
7
votes
2answers
1k views

Why should I restrict the content type of files be uploaded to my site?

We are building an application where users can upload resumes in our system for our administrators to download. We are having a debate about restricting the content type of the files that can be ...
3
votes
1answer
2k views

My S/MIME certificate (created with OpenSSL) does not match my email address

I created a certificate with OpenSSL and following commands: openssl req -x509 -nodes -days 365 -subj '/C=DE/ST=state/L=city/CN=hostname' -newkey rsa:1024 -keyout mycert.pem -out mycert.pem ...
2
votes
1answer
201 views

Are COMET installations immune to “Slow TCP Reading” DoS on Windows? (Such as SignalR or WebSync)

My understanding is that COMET implementations of WebSync and SignalR do not directly use IIS and are a few layers lower on the ISO model. After reading Qualys's blog regarding slow TCP reading, I ...
1
vote
2answers
4k views

What needs to be done on a Citrix Netscaler to protect from SSL Renegotiation attacks?

I'm under the impression that the TLS/SSL renegotiation hack has been fixed. I'm not sure if the software has to be deployed on the server side, client side, or both. Based on this blog, TLS ...
7
votes
1answer
849 views

Open Problems in Security?

I know it might seem a bit too much theoretical, but I was wondering if there was some list of known open problems in security? In a similar way that there are open problems in Theoretical Computer ...
5
votes
3answers
2k views

confused: computer security & software development career tracks [duplicate]

I'm a recent computer science graduate. I like computer security and want to be a security architect. I googled it and saw that the start point is to be a system administrator, but system ...
4
votes
4answers
8k views

Router Ports open

What ports on my home router should be open, say if I'm only using it for browsing the internet. Right now these four are open, 23/tcp open telnet 53/tcp open domain 80/tcp open http ...
3
votes
1answer
2k views

Storage of 'secrets', keystores, HSMs and the rest

I've been digging for the past few days into storage of sentitive data. If I store this data in a database, I believe the general accepted practice is to store sensitive data encrypted, for various ...
2
votes
1answer
168 views

Firewall Considerations with PGP Universal

The PGP Universal server is a fairly complex piece of work that provides several different services. When constructing firewall rules I am trying to determine what implications there are for opening ...
1
vote
3answers
936 views

OWA Keep-Alive in http, even though it should be forced https

Yesterday, I got an alert from a client's IDS that a Base64 auth packet was detected. Looking at the ASCII decode, I can see that it is for their OWA (Outlook Web Access), and indeed, the auth info ...
48
votes
6answers
14k views

How hard is it to intercept SMS (two-factor authentication)?

A lot of two-factor authentication mechanisms use SMS to deliver single-use passphrase to the user. So how secure is it? Is it hard to intercept the SMS message containing the passphrase? Do mobile ...
8
votes
1answer
449 views

How to apply IT Security knowledge to Home Security?

Today my car got stolen from my house, and it is possible the person who did it has access to my home. I try to take secure measures online to maintain security, yet it seems I never paid attention to ...
0
votes
1answer
352 views

Are export ciphers allowed in DTLS 1.0?

In RFC 4347 for DTLS, I am unable to find the cipher list to be supported. The RFC mentions it as a set of changes from TLS 1.1 (RFC 4346). TLS 1.1 prohibits use of export ciphers. Are export ...
0
votes
5answers
908 views

What voip client support manual encryption?

In pidgin there is a plugin that we can use to encrypt our messages in chat windows .. Is there anything simular for voip (pc to pc) ? any client that support manual encryption for voice data?(linux)
3
votes
3answers
2k views

What are some recommended open source tools for web browser history analysis?

I'm looking at a series web browser histories from various browsers (IE, Chrome, Firefox, etc) and need to do some analysis. All of these browsers store data much differently, but I was wondering if ...
3
votes
2answers
163 views

Teaching security concepts

I think it would be nice to teach security concepts by giving practical examples. I am looking for some practical cases for x509 certificates, kerberos and SET. How could I know an ecommerse site ...
1
vote
2answers
266 views

References to issues of putting backdors into opensource (like OpenBSD) by FBI or CIA [closed]

There are articles on the Internet (e.g. this) that claim that the FBI/CIA injected security backdoors into OpenBSD. I'd like to know if there are any other references to this issue. This would help ...
6
votes
1answer
4k views

Getting a Root CA accepted in systems and browsers

I would like to ask about the procedures for a given CA to get one of its root CAs (SSL issuance CA) to get accepted and installed as a trusted root CA in operating systems and browsers.
3
votes
2answers
827 views

Securely expose WebService from Enterprise Network to Internet Client

(coming from stackoverflow) Are there any standards (or certified solutions) to expose a (Web-)Service to the internet from a very security-sensitive network (e.g. Banking/Finance)? I am not ...
2
votes
2answers
350 views

Legal Risk to unpatched servers

Since one of the 10 domains on the CISSP is legal/governance, I figured this would be the best place to ask. I recently did a security assessment for a non-profit. I found that their systems needed ...
5
votes
10answers
610 views

Can a compromised mobile phone be used to penetrate a desktop or server?

Can a compromised mobile phone be used to penetrate a desktop or server, such as when you plug the phone into the server or desktop for plug and play? I don't know what protocol the transfer is ...
1
vote
1answer
304 views

Trying to land a shell on a remote service

Here's the scenario, part of a wargame/CTF type exercise. There is a vulnerable program running as a service on the remote host. I have access to a copy of the binary, which has a stack overflow from ...
25
votes
13answers
32k views

How to learn penetration testing at home?

I am interested in learning ethical hacking or penetration testing to head towards a career in that direction. I have a strong knowledge of linux and unix, basic computer theory and practice and ...
5
votes
1answer
690 views

Is BitLocker on a virtual machine FIPS 140-2 security level 1 compliant?

BitLocker can be used as a cryptographic module to fulfill FIPS 140-2 security level 1 compliance. What if the encrypted drive is on a virtual machine, is that still FIPS 140-2 compliant? In one ...
1
vote
3answers
270 views

Is email between 2 parties secure if both mailboxes are on the same server and both clients use SSL?

Sorry if this is incredibly basic, but I'm not very familiar with how SMTP works. I have a mail server (running Postfix with Dovecot) with an SSL cert from a well-known/accepted CA installed and ...
5
votes
3answers
790 views

Best way to alert a website owner of a vulnerability?

recently i was browsing a site, and i noticed that at the end of the URL it said id=168, which is a common indicator that the site is vulnerable to an SQL injection attack. i did some tests and found ...
5
votes
2answers
6k views

Recommended Cipher Suites for TLS 1.0, 1.1 and 1.2

There are a lot of cipher suites defined in the in the specifications itself of TLS 1.0, 1.1 and 1.2. And furthermore, there exist RFCs which add even more cipher suites to a specific version (e.g. ...
2
votes
1answer
488 views

Does client certificate authentication demand more server-side entropy?

We have a secure web service running Apache that requires client certificates for access. This service has a problem with running out of entropy. We have several other sites that use TLS that get ...
4
votes
4answers
6k views

Reflector - obfuscated code

I run Reflector to de-compile some program and it seems to be obfuscated. I got following output, it’s not very useful. Any ideas how to decompile obfuscated code? [CompilerGenerated] get ...
0
votes
1answer
716 views

Cisco PIX SNMP enabled or not?

On a Cisco PIX firewall, I wanted to check if SNMP is enabled: pix# sh snmp-server no snmp-server location no snmp-server contact snmp-server community public no ...
5
votes
1answer
538 views

question for pentesters: PHP proc_open() in safe_mode

Can anybody explain to me how proc_open() is affected when PHP is running in safe_mode? As far as i have noticed, the command to execute is appended to a '/' - is there anything else and is it ...
4
votes
1answer
832 views

Does installing Apache on my local machine create new security risks?

I am developing a small LAMP online app, and so far I have been doing all the development online. I am considering installing Apache/PHP/MySQL on my Ubuntu machine to be able to develop locally as ...
1
vote
3answers
1k views

what's the absolute worst damage javascript could do to a client?

Assuming I have a defenseless client computer running Windows 7 that will happily allow any javascript code it comes across on the internet, what's the worst damage that could be inflicted? I'm ...
3
votes
4answers
367 views

sha512 as no-login-necessary token

My site has a news subscription system. When an item is updated, a notification email goes out to everyone subscribed to that item. You can un/subscribe via a form on each item's page. I wanted to ...
0
votes
2answers
518 views

TimThumb security alternative or fix?

"An image resizing utility called timthumb.php is widely used by many WordPress themes....The utility only does a partial match on hostnames allowing hackers to upload and execute arbitrary PHP code ...
3
votes
3answers
140 views

What is a simplest “Crash an application” demonstration to get access to a system?

For a presentation (10-15 mins) purpose what is the simplest demonstration of "crashing an application" on a machine can be done.
4
votes
2answers
2k views

L2TP/IPsec shared secret: Can it be public?

My university provides a VPN service to gain access to internal services to all members. They are apparently using an L2TP/IPsec solution by Cisco. I'm able to connect just fine, but I'm a bit ...
2
votes
2answers
420 views

when you are phished, what do they get?

Lets say I was foolish enough to press on a YouTube video on Facebook that ended up being what I suspect is a phishing link. What can they potentially get? I had three tabs open: (1) my phpMyAdmin ...
4
votes
1answer
858 views

Why ESTABLISHED,RELATED for INPUT only?

In many places and tutorials I see people add this line to their iptables: -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT And they do it only and only for "INPUT". What about OUTPUT and ...
7
votes
2answers
3k views

Exploits or other security risks with SVG upload?

I have a site, where people can upload graphics, you might think of it like an image hoster or a forum for pictures. Now, I allow upload of raster graphics to a certain size, but no vector graphics ...
15
votes
5answers
14k views

What are the pros and cons of a VPN for privacy

Recently I have been getting more and more interested in the security (privacy and anonymity) issues of my online life. Not that I have anything to hide, or that what I do online is so interesting to ...
3
votes
2answers
715 views

HTML Vulnerabilities

My question is three-fold. Background I was asked to do some vulnerability scans on a website with some holes (I think). On a particular page, I was able to escape the text field and write on the ...
2
votes
1answer
140 views

What is a good method to report security breaches that are being used to actively spam?

I received an email the other day purporting to be from a bank I hadn't even heard of, so I decided to poke around. On some quick investigation, it looks like something has just latched onto some poor ...
1
vote
0answers
177 views

How anonymous used UTF-16 ASCII to fool PHP escaping [duplicate]

Possible Duplicate: How anonymous used UTF-16 ASCII to fool PHP escaping (Reposted here as per request). A few months ago, anonymous took down a child pornography site using SQL-injection. ...
15
votes
3answers
13k views

How to test for the BEAST attack if server isn't Internet-connected?

I'd like to test a server specifically for vulnerabilities related to BEAST. What command line switches should I use? What should I see (or not see) in the output? Update The intent is to scan a ...
2
votes
1answer
744 views

Are .NET WebServices vulnerable to CSRF?

While developing TeamMentor I implemented a number of WebServices (consumed via jQuery) and now on its final push for release I want to double check that they are not vulnerable to CSRF. There isn't ...
0
votes
3answers
232 views

What is the most reliable way to transfer emails without specific recipient support?

Many suggestions on transfering emails securely can be found in this answer. But many of them (e.g. PGP) need support from recipient. I want to provide SMTP email server that will route emails of it's ...

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