Application security - Specific to securing an application rather than the connection, infrastructure, browser etc

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Shared Memory expolit in smartphone OS

Today there is news about smartphone OS (Android, Windows and iOS) security hole using which some researchers have found a way to literally read all user activity from mobile screen. This is one of ...
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87 views

Reply to email or text as verification?

I've seen plenty of websites that, during the signup process, require me to verify my email address or cell phone number by clicking an emailed link or by entering some one-time-use code that's been ...
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Should Javascript & IFrames be used to refresh sessions when Master Cookie Domains are used?

Suppose I have 3 sites that I want to have SSO in, site1.com, site2.com, and auth.com. SSL is always required. According to how SiteMinder cookies are described here, one of those domains would ...
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4k views

Browsec - VPN and anonymizer

According to Browsec's website this application can be used to Bypass firewalls. So in countries like Iran it seems a useful tool to bypass censorship and filtering. For start using this application ...
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How to secure a public device against abuse? [closed]

What I mean by public device? E.g. in Germany we have small stations to charge cars powered by electricity. This stations are small towers with a flap. Behind the flap are plugs to connect the tower ...
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Is there a repository of credentials used in training materials/samples and SDKs?

Similar to a default password list for network appliances, it's conceivable that application layer passwords are default from training materials given to a developer. In fact, I have discovered ...
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31 views

Mobile App Processing Debit Card Transactions

I am creating a mobile app for iPhone and Android and the respective API that will be exposed to support the operations. This operations will require the customer to type the PIN to complete the ...
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38 views

Application Security Input Validation: Validating Environment Variables and Config files

I am watching a training video called "Creating Secure J2EE Code". The video makes this statement: Perform all validation in a secure context on the server. Do not rely on client-side validation ...
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110 views

Separate log-in panel for administrators?

I have a dispute with my father about the following ... I want to make a website (with MySql database) and use the root/index - page for BOTH the log in entry for normal visitors AND log in for ...
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712 views

How do you capture ALL the traffic from an Android app?

I want to capture all the traffic from an Android app for its pen-testing. How do I do that? Here's what I've already tried: I installed the app on an emulator and started the emulator with a ...
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41 views

Is it possible to prevent attackers from destroying sessions using cookie tossing and cookie overflow attacks?

I won't really go into details of how cookie tossing and cookie overflow attacks work, because this answer explains it perfectly. This post on github explains some mitigation strategies, but does not ...
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Heap canaries, to protect function pointers in heap objects

I'm wondering if anyone has previously proposed, evaluated, or deployed the following measure to harden systems against heap-based buffer overruns: basically, stack canaries, but applied before ...
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2answers
102 views

Heap spray against 64-bit processes - possible?

Are heap spray exploits possible, if the process we're attacking is a 64-bit process? Naively, it seems like the 64-bit address makes it difficult to mount a heap spray: to fill all (or a significant ...
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1answer
67 views

Web-based intrusion detection integrating visibility into web app and database

Consider the problem of hardening an existing, database-backed web application, to detect attacks and stop them where possible. It seems like one plausible approach might be to build an intrusion ...
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How often is ASLR randomness refreshed, in Linux?

Most Linux distributions now use ASLR for many programs, to randomize the layout of memory. How often is the randomness used for this changed? If I re-run the same program multiple times, will it ...
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118 views

Defend against Blind ROP

At IEEE Security & Privacy, the blind return-oriented programming attack (blind ROP) was just introduced. In some sense, this is just another variation on ROP attacks -- but the blind ROP attack ...
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How do Android reverse engineering tools extract packages/ package hierarchy present in Android apps? [closed]

I have been involved in disassembling Android apps using baksmali and dexpler. Whenever I disassemble an app, I find the packages and package hierarchy (that would have been available in development ...
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1answer
103 views

What's the security impact of tampering with Google OAuth continue parameter?

What's the security issue of this scenario related to tampering with the continue parameter: Go to: https://accounts.google.com/ServiceLogin?service=[service ...
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2k views

Are SMS,MMS stored on the network service providers' servers?

Are SMS and MMS sent via a mobile phone stored on telecommunication service providers' servers before passing them to the recipient? Does it depend on the country or does every network service ...
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59 views

code optimization and security?

My background is in compilers/code optimization, and I'm wondering whether there might be any interesting applications of extremely aggressive runtime code specialization towards improving security ...
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103 views

Storage of the One Time Password Seed

I'm a student and I'm working on an OTP authentication systeme based on OATH using smart phones as tokens for the clients. My problem is the protection the OTP seed at both client and validation ...
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1answer
131 views

how to use hash passwords to retrieve keys from keystore or access database

How do I hash the password for a keystore? How do I then use the hash to retrieve something from keystore? Similarly, how do I use a hashed password for accessing the database? I have encrypted the ...
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2answers
67 views

cleartext passphrase for keystore

How is passphrase for a keystore to be stored? we have all passwords encrypted and the key to encrypt is stored in keystore , so how is the passphrase for the keystore to be stored? in clear text? if ...
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21 views

What are the fields needed to check for SQLI, XSS, XSRF and Remote file inclusion attacks in apache access log file [duplicate]

I need to identify the SQLI, DoS, XSS attacks from log file. At which field these attacks will reflect in log file. Please suggest me some idea and send materials to me.
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301 views

Registration Password

Is it best to create an application that allows a user to sign up with username and email at the beginning and password once you click the generated email sent to you or should the password entering ...
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1answer
115 views

Is there a way to report IP addresses scanning for Exploits?

We're currently running a web site using .NET, and I'm using the Elmah package to look at some errors and issues in real time. I've noticed that there are a number of errors in the log from IP ...
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108 views

Fuzzdb detected as Trojans [closed]

I recently downloaded fuzzdb from http://code.google.com/p/fuzzdb/ and my antivirus kept on detecting some of the files as Trojans. I need to know if these files are safe?
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318 views

Exploitability of use-after-free vulnerabilities

Use-after-free bugs are a particular class of memory safety bugs. How often are they exploitable, in practice? When you find a use-after-free bug in a program, is it often exploitable, rarely ...
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36 views

Is it possible to keep several files on windows partition after re-installing windows? [closed]

Is it possible to keep several files and programs on windows OS after re-installing it? because of someone can steal the device that uses windows OS, then just removes the windows and install another ...
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81 views

Secure Communication Between .Net Application and Website

Recently, We developed an application that we want it's users to pay for a monthly subscription in order to use it. So the first thing that came to our minds how to implement a secure way for our ...
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234 views

Outsourcing software development and its effect on security

Some companies build their own software. Others outsource software development by hiring contractors or other companies to build software they need. When we need to build new custom software, is ...
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9answers
44k views

Why can we still crack snapchat photos in 12 lines of Ruby?

Just came across this bit of ruby that can be used to decrypt snapchat photos taken out of the cache on a phone, apparently adapted from here. To my surprise, it worked no problem, considering the ...
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2answers
154 views

safe methods of generating session keys

So I have this web app where I'm supposed to generate my own session key to use in the session manager. I just have few questions about safe approaches to this. I believe to make this safe it should ...
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4answers
272 views

What are the main security considerations that must be taken into account if you intend on creating a (localised) whistleblower website?

Also: Is it something that can be achieved with limited funds? I ask because I am intrigued by the obstacles that are in place.
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How could a comments plugin be securely loaded from domains people are already logged into?

The fundamental idea is to load a blog comments plugin (like Disqus) from a domain someone is already logged into to save users time and increase engagement. I like the facebook comments plugin ...
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2answers
119 views

Where is the Line? [closed]

A comment posted on one of my questions the other day raised a question in my head. I know that many site admins appreciate users reporting bugs and security holes, and as a user I appreciate people ...
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4answers
491 views

Does my UI need to be secure if my API is?

I'm working on a project that is creating two new, separate web modules (possibly even on different servers) to support a new web application, with one serving up a static JS-based UI and the other ...
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221 views

Zlib DEFLATE decompression bomb

Can you give me an example of a short data string that, when decompressed using Zlib's DEFLATE method, expands to something much much longer? More precisely: what is the nastiest decompression bomb ...
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2answers
313 views

API Security Testing Methodologies

I have been encountering more and more clients needing their API (usually REST) endpoints tested for vulnerabilities and wanted to reach out to see if anyone has some recommendations beyond what I ...
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212 views

Building a web application security focused team

I work as an application architect at larger company that builds web applications using both .Net and Java technologies. These are sold to and accessed by other businesses (not consumers). We have ...
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1answer
705 views

Why does Directory traversal attack %C0%AF work?

Introduction: I am trying to learn the basics of Directory Traversal. Question: While trying to understand the 2-Byte Unicode conversion of characters, I came across this_SANS ARTICLE that explains ...
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2answers
241 views

Required skills before jumping into vulnerability research

Hello I'm a beginner into IT security. I want to become ethical hacker. So I know how to use metasploit to write exploits, and how to use different fuzzers, but I think this isn't enough. I can read ...
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Penetration testing reported ZERO vulnerabilities. Does this mean my web app is secure?

I've spent many hours on whitebox testing to make sure my code was safe. From a theoretical standpoint, the code SHOULD be safe. I then used several widely known testing tools (including one that ...
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2answers
355 views

NX bit: does it protect the stack?

I once heard the NX bit was a panacea, then that it was not. One detail I've wondered about though: Does the NX (no execute) bit protect against code inserted into the stack and executed there? It ...
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1answer
67 views

How to pass an email address securely to a web application X embedded inside a web application Y

The scenario I'm trying to address is this: There is a web application Y which has an authenticated user. Inside Y, web application X is hosted (which belongs to a different domain). When X is ...
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3answers
492 views

Why CSRF Token has to be a Cryptographically Strong Random number, in Double Submit Cookies method?

I was just going through the OWASP's Cheat Sheet for CSRF Prevention. In the Double Submit Cookies method, I saw this the site should generate a (cryptographically strong) pseudorandom value ...
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2answers
865 views

Token authentication and storage / websocket issues

My application is running an API authentication that uses tokens rather than cookies. This leads me to ask a few questions : What is the most secure way to store the token ? By using random ...
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1answer
169 views

How can I succesfully pentest site with two factor authentication? [closed]

I want to use a commercial, automated tool but it cannot login successfully because the website requires a two factor authentication process using SMS. For testing, the SMS message is sent to another ...
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3answers
148 views

Can “remember me” be done securely on an accountless website?

I have a website that lets users submit a form without having to create an account and log in. However, in order to keep users accountable for their submissions, the form requires them to provide ...