An application that is accessed over a network such as the Internet or an intranet using a browser.

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-1
votes
0answers
25 views

Do iPhone Chrome & Safari keep refreshing and sending my IP address to websites while in background?

You can put a browser like Safari or Chrome into the background on iOS without closing your tabs. Will they keep refreshing themselves and send out personal details like your IP address? What about ...
2
votes
1answer
32 views

Checksum Calculation for Source Code tar balls downloads

Http sites like OpenSSL provide checksum for each source code tarball available for download HTTPS sites like GitHub usually do not provide checksum with 'download zip' option. Some sites although ...
1
vote
2answers
46 views

What measures must be taken to securely authenticate from web traffic to a WebSocket connection?

Obviously TLS is a must for any and all secure authentication. Please turn your paranoia settings up to 11 for this. Background: (In case people are unfamiliar with the WebSocket (WS) protocol and ...
0
votes
2answers
70 views

Persistent XSS in Blogger domain

I have discovered persistent XSS in blogger domain. I have reported vulnerability to Google Security Team and I received this is the response: Users are permitted to place arbitrary JavaScript, ...
-3
votes
3answers
59 views

What security problems are there with enabling directory listing on my webserver? [duplicate]

I want to to ensure that every file on my webserver is secured. The problems I am having right now: If you go to my website, and enter a url like mywebsite.com/img/ if there is no index page in ...
0
votes
2answers
51 views

Centralized local hosted web based password manager

In our company we have more than 100 employers and everyone use several online applications daily. To access all of this sites they need a password which was now stored very insecurely. so I'm ...
1
vote
1answer
103 views

What security practices should I keep in mind during development? [on hold]

I am beginning to develop apps for Android and iOS that make API calls to a PHP web application that I will be developing. Users will be required to sign up with a username, password, and (optional) ...
-4
votes
0answers
45 views

XSS filter evasion when “less than” followed by an English character is filtered [on hold]

In a recent penetration test, I encountered an XSS filter that allows <,> to pass without encoding, but blocks <a, for example. The filter allows < <_ <, <ש, but DOESN'T allow ...
-7
votes
0answers
30 views

what reconnaissance or foot-printing tools for network or web, do you recommend? [on hold]

what reconnaissance or foot-printing tools for network or web, do you recommend?
-4
votes
1answer
41 views

Some good resources to learn about Javascript DoM based Cross site scripting? [closed]

I'm learning Web Application Security, Please post some good resources to learn about DOM based XSS (Basics to advaned) Thanks... -Dave
2
votes
1answer
70 views

Google Analytics use of JSONP, what are the security risks?

These days Google Analytics uses a JSONP request to load ga.js into user's web pages via a callback function. According to the Wikipedia, JSONP can "inject any content into a website." What exactly ...
2
votes
1answer
46 views

Using RSA for Web Application Authentication

I have a network that is only accessible through bastion servers over ssh. In it, I am developing web applications that are exposed to end users via GUI's served up over websockets. All traffic into ...
2
votes
1answer
67 views

How to Develop Waf as Service [closed]

Recently, I've started a my educational project WAF as service. To develop this project as per my view, following things are required: Web Application Firewall is in-line with the web servers; it ...
1
vote
1answer
36 views

How to migrate users? (Changing the login system)

Let's say that you are about to change your log in system and you have a few millions of users that you want to switch to the new system. Specification Old System Username : email address Password ...
0
votes
3answers
105 views

What are the different payloads used for XSS vulnerability? [closed]

I am new to information security field. I am searching for XSS vulnerabilities. In XSS mostly they use <script>alert('XSS')</script> payload for attacking a websites. In the case of ...
3
votes
1answer
27 views

Server based pdf signing using etoken from a client browser

I have a requirement where a PDF document is generated on the application server in a web based .Net application and the same is digitally signed and mailed to the recepient. The signing and mail ...
1
vote
0answers
36 views

authentication model using oAuth

I am planning to use facebook authentication for my website window.fbAsyncInit = function() { FB.init({ appId: 'APPID', cookie : true, xfbml : true, version : ...
-2
votes
2answers
44 views

Exploiting SQL injection union base [closed]

A PHP website ends with php?id=1 and when I place a tic it prints this error: Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in ...
2
votes
2answers
78 views

Is this an appropriate anti-CSRF method?

I have the following system in place on my web app and I'd like to know if it's secure. Cookie contains CSRF token. Application detects CSRF token in cookie. Application places token in a header. ...
4
votes
1answer
77 views

Different SSL/TLS certificates for subdomains

I have HSTS enabled on several domains that I host/maintain, and I'm using free verified certificates from a provider that only allows encryption of the root and one subdomain on the certificate. They ...
1
vote
1answer
52 views

Sandboxing untrusted user-supplied code in a web application

I am trying to create a programming game where user-supplied programs compete in battle simulations, to be used as a tool to teach and practice programming. (It will likely be a turn-based robot ...
0
votes
0answers
39 views

Potential security issues in a two-part upload process

I use a pre-signed URL approach for uploading files to a private S3 bucket. A CloudFront distribution is configured to use this bucket as the source. The upload process is only available to ...
4
votes
3answers
122 views

Session vs Cookie Authentication

Here what I means by the two : Session Authentication : Stored "Is authenticated" state in a session variable. Cookie Authentication : Stored "Is authenticated" state in a cookie protected from ...
0
votes
0answers
35 views

Comparing Oauth and JWT auth in my web application

I have created an e-commerce website which has a REST API on the server side and Angular on the client side. I am considering to use OAuth to secure my API, but it seems to overkill because I have no ...
0
votes
1answer
31 views

How to verify SSL cerficate If restored session after session broken?

For example: User accessed to my web through SSL wih MYCERT. Suddenly hacker break this session, set proxy between user and my web . User connected again over restored session through HACKERCERT. How ...
2
votes
3answers
153 views

Email confirmation techniques in major sites

The way I understood traditionally for email confirmations to work is the user registers to the site with their email and then to login they must verify their email. If they have not verified ...
1
vote
1answer
45 views

open redirect via POST? [duplicate]

HTTP Request(POST): per_page=security.stackexchange.com&order=questions&redirect=HTTP://security.stackexchange.com/ So when I record my request I get these 3 parameters and when I edited it ...
17
votes
3answers
2k views

Why is it insecure to store the session ID in a cookie directly?

I am learning about session middleware. You have to supply a secret or the middleware complains: app.use(session({ secret: "abc", resave: false, saveUninitialized: false, store: new ...
0
votes
1answer
48 views

Control access to public API

I'm working on a public API for project X. System allows to register an app_id and call API methods providing it, as usual. Now, I need to develop an official mobile client for project X that should ...
10
votes
4answers
336 views

What are the drawbacks of login request throttling?

In a web application, one way to protect against password guessing attacks is to lock out accounts after a set number of failed logins. This could be done on both source IP address and username. For ...
0
votes
1answer
31 views

JWT for email validation of an account

I am thinking of using the this registration flow for my site: 1) User registers by entering email and password. 2) Enter the email and hashed password into my database 3) I then construct an ...
0
votes
2answers
48 views

Precauations for web application security audit

We have planned to give our web application to a third party vendor,what were the precautionary measures which we need to take care before giving our application to third party vendor? As the vendor ...
1
vote
1answer
182 views

Should I trust zxcvbn with my password?

I want to measure current and future password entropy with the zxcvbn formula. Is there any way to test and detect if the input on this website is truly confidential? EDIT: 1. I found an ...
2
votes
3answers
140 views

Where is the most secure location to host an admin panel?

I have an admin panel on my site, that enables me to control the content on my website. In order for the admin panel to achieve this, I must have a connection to the site's database. I have two ...
2
votes
2answers
370 views

What do I do if I find XSS on my website?

I found reflected XSS on my website. And its fixed now. There are a lot of websites which tell how a XSS can be detected or what can be compromised but I could not find what measures should be taken ...
0
votes
1answer
168 views

CORS & CSRF Prevention for an REST based API

I'm currently trying to wrap my head around how to prevent CSRF. My first solution was to use a token which is suggested everywhere. That would of course fix this problem: <img ...
1
vote
1answer
143 views

Execute cmd commands with http directory traversal attack

Question Summary: I am trying to create a lab scenario wherein the "attacker" is intended to perform a directory transversal attack from an HTML page and move into the Windows system directories. Can ...
2
votes
0answers
73 views

Suspicious web-application requests containing encoded JavaScript function(?)

I've been seeing some odd traffic in the logs for a web-application (Apache) that I'm wondering about, and I'm hoping that someone here has seen this before. The raw requests were variations of: ...
1
vote
0answers
104 views

WhatsApp Password generation [closed]

Is it known how the WhatsApp-Servers generate the password for the user? My Google-Fu is not strong enough to find it out by myself. For reference (Step 6 / 2, I mean the step in which the server ...
0
votes
0answers
37 views

is Form Authentication more secure than using the session authentication?

Recently I have read about the form authentication of Asp.Net but I can discern no differences in the term of security between it and the session authentication. For Example if somebody hacked my ...
1
vote
1answer
59 views

Multiple Bank Accounts on one payment gateway or merchant account

I'm looking to use PCI compliant payment gateways such as Authorize.net or Spreedly.com in my website. However in my particular case (hotel, tour, events reservations), we will serve as an ...
0
votes
1answer
76 views

Can servers store the mac address of the computer on the server side to prevent session hijacking?

Can servers store the mac address computer on the server side to prevent session hijacking? For example, if in the server side, the servers store the mac address and the session id as a pair and ...
0
votes
1answer
47 views

What is a good risk assessment for different types of online file references?

Personally I'm a big fan of hosting everything myself, just because of the privacy aspect. For that reason I try to use external files as least as possible. Nevertheless, I'm wondering if it is a ...
1
vote
2answers
81 views

Saving an Id on a cookie. Security point of view?

I'm developing an ASP.NET MVC 5 website, which a user can select some filters, based on those fillers the server process a result, and the user can make a order and pay for it. In my Order table i ...
0
votes
2answers
64 views

Do I require a SSL certificate for using Google Login?

I am working on a new site, and in order to avoid security hassles, I'm planning to provide Google and Facebook login to my website. Do I still need a SSL certificate or is it not necessary? ...
0
votes
0answers
58 views

Bypassing Change Name Uploader

I have read all of the questions available on SE about bypassing the change name uploader. Consider an uploader which changes the file name each time you try to upload a file. The only allowed formats ...
1
vote
1answer
94 views

Are there any security disadvantages of using production SSL certificate in non-prod environments?

My client has a wildcard certificate *.thierdomain.com that they are using for half a dozen of production web sites. For each of theses sites there are duplicates in several environments, dev, qa, ...
9
votes
3answers
1k views

How secure are sha256 + salt hashes for password storage [duplicate]

I started reading about password hashing recently on multiple sites like this page on crackstation and others, and for what I have understood, I should avoid using hashing algorithms like md5 and sha1 ...
2
votes
3answers
329 views

GET and POST request vulnerable to CSRF attack?

Are both GET and POST request vulnerable to CSRF? Should we use PUT instead?
2
votes
1answer
104 views

Is Two-way SSL sufficient for Multiple web servers communicating to each other?

I have a fixed number of web servers. Each web server represents a company and the users of the company talk to their assigned web server. I have this setup to decentralise the databases. So if one ...