Questions tagged [web]

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votes
0answers
27 views

XXE OOB Large File Extraction

Most of examples for extracting files through XXE OOB (Out of Band) sets up a listening HTTP server and listens to incoming request on the URL requested. However, since the URL length is limited to ...
1
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0answers
55 views

How to perform web spider if web content is only visible to registered accounts?

I am reading the attack & defense strategies of web spider. Assume I have sensitive information on my website, which should be avoided from 3rd party web spider. Use case #1: Me: I set the ...
2
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1answer
287 views

Why does the file “shell.php.jpg” can execute as a php file but “shell.jpg” cannot?

I am learning about file upload vulnerabilities using DVWA. After cranking the website's security level to High, the website checks both the post request's content type & file extension, so in ...
1
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1answer
38 views

How to secure embedded code containing REST api call

I am making a Google Analytics like service where you embed generated code into your website and it tracks certain data. I have a backend REST api, but I am not sure how to securely implement a call ...
1
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0answers
33 views

How to know what version of extensions are used in joomla-web-site from user's point of view?

The problem is: I'm a user and I'm to find out what version of extensions(modules, plugins and components) are used on Joomla-site. In simple cases the version is already written,like here: ...
1
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2answers
105 views

Non SSL website with external SSL secured service

I'm working with site that is served via HTTP. Authentication service is external and served via HTTPS. I'm not sure that this isn't security concern that is website is not using SSL.
0
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1answer
82 views

When should you give up on attempting a xss on part of a website? [closed]

I'm wondering when do you give up on some type of user input to exploit? What are the things that go through your head and that you check off, that makes you think that the input is properly sanitized?...
0
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0answers
45 views

Web Site Access - Port Whitelisting

I am able to access a certain website https://buzzlightyear.acme.com:68080 from within a corporate network (Obviously the default https port 443 has been allowed in the windows firewall of the machine ...
0
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2answers
114 views

Identifying a script used for vulnerability scan

The logs of a server are showing a great number of 404 responses in a short time. Apparently somebody used a tool/script to look for known vulnerabilities by combining the server and part of the path ...
0
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0answers
133 views

'=' 'OR' SQL Injection Login Bypass Question [duplicate]

I was testing SQLI Cheatsheets on a vulnerable test site. This particular injection '=' 'OR' seems to work on the login page. Why does that injection work? What's the back-end SQL code, if I could ...
0
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2answers
92 views

Cross Site Scripting href=/\evil

I've seen <base href=/\evil> and <base href=//0> as a vector to use XSS. Could someone make an example using these vectors and explain me if "/\" is the same as http:// or has some ...
2
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1answer
202 views

Websocket Authentication at Opening Handshake Sufficient?

Suppose TLS is used and a session ID was negotiated using standard HTTP mechanisms. With the websocket opening handshake, this session ID is also transferred in the HTTP header. Suppose the websocket ...
0
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1answer
68 views

Published URL File APP.CSS

I am crossing an analysis on a website and while fuzzing and testing I came across the below URL: https//www.****.**.*/content/css/app.css Which generated the below output: /* Minification failed. ...
0
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1answer
225 views

How is Instagram detecting me and blocking me each and every time I try to create a new account through different medium?

I have two Instagram accounts, one is mine (Account A) and the other (Account B) is for random images with my pets and a lot of other stuff. Account B is private and has been from start, recently I ...
49
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5answers
11k views

What exploit are these user agents trying to use?

I just looked at my user agent tracking page on my site (archived on Yandex) and I noticed these user agents. I believe they are an attempt to exploit my server (Nginx with PHP). The 1 in front of it ...
1
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3answers
115 views

Best practices to prevent logging of LDAP credentials by intermediate apps

I am working on transitioning our project management tool (PMT) to use LDAP authentication instead of native auth that's currently in use. We also have some internal web-based tools that interface ...
1
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0answers
147 views

Is there a way to exploit file_get_contents that has a prepended website?

suppose I have the following code that will display an image. The name of the image is supplied by the user as follows: https://example.com/image.php?image=cat.jpg My image.php file contains $...
0
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1answer
34 views

CSRF protection for an email subscription website - are there any risks of having it turned off?

I have a main website with an email subscription form. And my other websites where I have an email capture form. A user enters their email on those website and via POST he's redirected to the main ...
1
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0answers
60 views

How to determine if a website has been hijacked?

I noticed that the URL of a website I sometimes visit was redirecting to a new URL. I noticed this through a tool that I use that does not actually load the new URL. I was surprised by this change, ...
0
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0answers
25 views

Does limiting the length of a password help prevent DoS attacks? [duplicate]

I was told that you can DoS a server with unlimited password length because of the time that it would take to hash it. But isn't the password hashed on the client's side before leaving the user's ...
-1
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1answer
58 views

what are steps to do in order to secure my appli web [closed]

I'm asked to secure an appli web and I don't know really which steps I can follow to secure my appli web.
0
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0answers
36 views

Is it possible to contract a virus on Ubuntu/Debian from an Apache Nutch web crawl?

For the fourth time now I have contracted a virus while doing a large web crawl on webmd.com. I'm not certain that this is where the virus is coming from but I don't see what else it could be. Is it ...
2
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2answers
64 views

Is it ok to send plain text credentials in a XHR GET request?

When testing my api server, I often requested the website http://domain.tld/api/?username=john&password=123456 to test things and after a while of course, my browser would autocomplete the url, ...
0
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0answers
39 views

How do I verify that a user on a remote system has root access?

Let's say an anonymous user somewhere on the internet claims that he or she is the admin/root user of the system/server behind some public IP Address. I was thinking, what can a root user do that a ...
0
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2answers
61 views

How to detect website active routes?

I'm building a website using Laravel and I'm just thinking about security. I would like to know if there is a way for attacker to detect all active web routes for a website ? For example: http://...
1
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1answer
218 views

What scenario does CORS protect against?

My understanding of the same origin policy is that it prevents scripts from making requests to resources outside of the domain from which they originated. One motivation of this is to prevent a ...
1
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1answer
86 views

What kind of redirect of websites is this? [closed]

Some websites can redirect you, but they're not using http 301 or 302. After that the url will be changed and you can't go back to the previous page using your web browser's back button. For example, ...
1
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1answer
406 views

Securing Flask admin pages

We've been developing a Flask app for a customer and a part of the agreement was that "customer admins" would be allowed to access Flask admin page to manage users, roles and business entities. The ...
-1
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1answer
1k views

Does an employer see if you try to access a blocked site? [duplicate]

Today while browsing on my mobile phone connected to my employer's wifi, I clicked on the link to a tumblr page. I then got an error message saying the web filter had blocked the page deeming it ...
1
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0answers
230 views

How to find no of columns using sql injection

I'm new to web penetration testing and when I tried to test a website, I found that when I entered ' in the text box, I would get the following error: OraOLEDB error '80004005' ORA-01756: quoted ...
1
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0answers
88 views

Webauthn and TLS channel binding

my understanding is that webauthn supports a variety of authentication schemes --not necessarily FIDO2/CTAP ; is that true? if so what is the api at webauthn that provides the hook? TLS channel ...
0
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2answers
503 views

Is telegram SMS login secure?

TL;DR: Can 1) A random hacker access my telegram account by entering my phone number on the official web.telegram.org authentication portal and hijhacking the SMS code they send? or 2) A "telegram ...
57
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1answer
4k views

Does a client certificate identify the owner to unrelated websites?

If I install a client certificate in my browser, which websites can see any information about this client certificate or the CA that issued it? I once visited an ssl diagnostic site that immediately ...
1
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1answer
29 views

Liquid security scenario

I'm a part of a small team of undergraduate developers taking a course on developing Arduino and Raspberry Pi applications with a focus on the Internet of Things. Our current task is to imagine, ...
0
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1answer
39 views

Why did a subdomain from a trusted website download a file?

I clicked on a link for the subdomain of a trusted website (the subdomain slackin.brilliant.org of the website brilliant.org), and instead of being directed to another page, a file called "download" ...
2
votes
1answer
262 views

Why does my Chrome still trust Thawte certificate?

Thawte certificates are supposed to be invalid since Chrome 70, but I have Chrome 70.0.3538.102 and it accepts certificate of this site just fine. Does anyone know, why that is? Should I be worried?
4
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2answers
193 views

Telegram (or other messenger) message as second factor in 2FA

Is it safe to send code via messenger bot and use it as second factor in auth? The scheme looks like the same as SMS one. A user opens application or look at a push notification and use the code. Why ...
1
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1answer
56 views

Real life scenario for remote file execution

This is a commonly demonstrated attack because it is easy to explain and understand. The premise is that the victim does something like (oversimplified PHP example): include( $_GET['file']); And ...
0
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1answer
51 views

Remotely included script cannot set session variables

I'm trying to simulate a remote file inclusion attack on my local web server as part of a course I am taking. I got the idea of being able to "logging" in on a website I set up without really logging ...
4
votes
3answers
1k views

Is hijacking a webcam after visiting a website a plausible threat?

(I made a throwaway to ask this question, since this situation is pretty embarrassing) Earlier today I started receiving emails threatening to send embarrassing video of me to all my contacts unless ...
74
votes
4answers
10k views

What is the purpose of (ab)using the redirect page of my website for dubious URLs?

My website has a redirect page with the format https://my.site/redirect?deeplink=https://foo.bar&... The redirect is implemented in Javascript, so when you request the site, you get a 200 and ...
0
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3answers
227 views

What are the Pros and Cons of allowing users to stay logged in to a web application?

To become a more well-rounded developer, having a better understanding of security concerns and best practices will help me endeavor to build web-apps that are both user-friendly as well as secure. I'...
3
votes
1answer
520 views

Why Same origin policy is based on host-name and not on IP?

Same origin policy is to restrict one page to access another document from accessing data. Because they have different origin where SOP define an origin as follows. An origin is defineed as ...
2
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0answers
211 views

SQL injection possible with parameter that seems to only accept integers

a similar question to this was already asked but it is not the same case. I am talking about this one Is SQL injection possible via integer? In my case, I already have the confirmation of this ...
0
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1answer
85 views

What is ScriptSafe's “Client Rectangles” and what information does it leak?

Just wondering how this one affects the privacy and security because it breaks a lot of sites displaying images for example.
-3
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2answers
88 views
0
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1answer
212 views

Is it possible to do XSS attack in server side programming language?

As far I know, when using 3rd party library of client side programming language/Javascript, you are vulnerable to XSS attack. Is it also vulnerable when using 3rd party library in server programming ...
3
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1answer
555 views

Is some kind of CSRF possible using img/script tag to read sensitive information

Let's say i have an API at https://mysite/api/getSensitiveData that: Uses GET Protected with cookie authentication Returns JSON with some sensitive data A bad guy creates a site on his server that ...
5
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2answers
546 views

Avoid being hacked with brute-force attack

During the last week, our company website has been under a weird brute-force, this attack actually led to hacking an admin account. Our website is a wordpress site. The attacker keeps performing POST ...
0
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1answer
61 views

Does Windows Authentication Use Secured Connection

I am writing a .NET Web API that will be used in an enterprise environment where users authentication themselves using their active directory credentials, so I am using "Windows Authentication" in IIS ...