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Questions tagged [webserver]

A system whose primary function is to deliver web pages on request to clients.

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Understanding Search Behavior on a Website [URL Encoding and Query Handling] [closed]

I’m currently testing the search feature on a website, and I’ve encountered an interesting behavior. The site displays the search query in the page itself, even if it’s an XSS payload (although it ...
Rudra Das's user avatar
1 vote
1 answer
83 views

Execution profile for web server

I would like to know if there is a way to run an app to exhaustion in terms of all possible outcomes that it can provide. What do I mean by that: Let's assume that someone has an (Apache) HTTP Server. ...
und3rd06012's user avatar
0 votes
1 answer
84 views

JSON array payload POC for CVE-2022-24999

I'm currently exploring if one legacy project is vulnerable to CVE-2022-24999 I found a very helpful GitHub repo with POCs However, in my case, I need to check if a payload passed in a JSON body to a ...
cis's user avatar
  • 347
1 vote
1 answer
65 views

Command Injection in URLs. Are response codes foolproof indicator of true/false positive?

Take this HTTP request as an example. GET /directory/blahblah/ping%20interact.sh Say this request receives any 3xx, 4xx, 5xx HTTP response code. Is it likely or even possible that a backend web server ...
jakechowder's user avatar
0 votes
2 answers
74 views

Is There a way to exploiting / Make exploit scenario for Header based reflected XSS?

I've found a reflected XSS, but the problem is that the attack vector is the header (any header). Is there a way to develop an exploit scenario based on this?
0xdead 4f's user avatar
5 votes
1 answer
892 views

What are the reasons for CORS failure errors to not be available to JS?

From Cross-Origin Resource Sharing (CORS) - HTTP | MDN: CORS failures result in errors but for security reasons, specifics about the error are not available to JavaScript. All the code knows is that ...
Ooker's user avatar
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0 votes
1 answer
76 views

Benefits of random responses to exceptions over generic error responses

Attackers can send requests with data that the server does not expect in order to try to get responses that reveal secret data. One common example is when the server experiences an exception. A poorly ...
n-l-i's user avatar
  • 421
1 vote
1 answer
108 views

Would monitoring for unusual process execution help identify intrusions on a web server?

I have a web server with each web application running as it's own machine level account. The server only hosts the web applications, no other services, dbs, etc. Apart from the web server processes, ...
Jonno's user avatar
  • 155
2 votes
1 answer
625 views

Public client or Confidential client: should I generate a client secret?

I've read about this but I don't fully understand how to choose. I have two options: Public client "A native, browser or mobile-device app. Cognito API requests are made from user systems that ...
BigMistake's user avatar
1 vote
1 answer
126 views

Are webservers's file serving safe against timing attacks?

Context I've been recently looking at UUIDs (mostly v4) and their uses to maybe start using them in some of my apps. I started asking myself some question about security as one does. Then I fell on ...
Stefmachine's user avatar
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101 views

Trying to generate TLS 1.3 Alert

I am trying to run tests on the TLS 1.3 protocol and I would like to generate alerts (as seen in TLS 1.2) that have a structure of the type ALERT:FATAL UNEXPECTED MESSAGE. So far, I have tried to use ...
Multi Uni's user avatar
0 votes
1 answer
140 views

Detect invalid cert Android client if URL being redirected to a fake server [duplicate]

Here is the scenario: Server A is an authentic server (A.com). Server F is a fake server (F.com) that also has a valid cert for F.com has a copy of A.com certificate to it (to fake as A.com). Client ...
Tung D. Nguyen's user avatar
1 vote
0 answers
289 views

Which is safer - using the sql_conn Flutter package or using a web server as a middle layer for requests against a SQL Server database?

We are currently working on setting up new Android handheld devices (RF guns) to read/write to our SQL Server 2019 database and are at a fork in the road in deciding what to do. Both options below ...
TheMortiestMorty's user avatar
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0 answers
118 views

Identify hosts that are serving specific metric on Shodan

Using things like Shodan and Zoomeye we can find tens of thousands of exposed Prometheus endpoints with queries like service:prometheus port:9090 etc.. Now let's say we know that there are entities on ...
vl.b's user avatar
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1 vote
2 answers
184 views

How to prevent attacks on a personal webserver

I'm currently working on some modules on hackthebox. In that regard, I recently set up a web service: sudo python3 -m http.server 8080 When I did a wget to my server, it showed up in the log as usual, ...
ojo's user avatar
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0 answers
574 views

Reverse proxy server in DMZ with separate server for nginx (docker)

Does it makes sense to create two separate docker hosts (VMs) for reverse-proxy and web application? My first idea was to put the web-exposed application in my separated VLAN (DMZ) where only ports 80 ...
ZeroW's user avatar
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1 answer
283 views

HIPAA Compliance for Frontend Hosting

I am using a non-HIPAA-compliant vendor (Vercel) for the hosting of my site. This includes serverless functions on Vercel's infrastructure that serve HTML/CSS/JS. However, the entire backend/database ...
Infamous911's user avatar
0 votes
1 answer
412 views

What vulnerability query params or body outside a whitelist can allow?

For instance, suppose we have a request that uses the field name in a request's body or query params, but the client sends the params name and age. Some web server frameworks allow us to strip ...
Vitor Figueredo Marques's user avatar
1 vote
1 answer
225 views

Unlisted directory discovery of a web server without using bruteforce attacks

Some creator I support on SubscribeStar hosts their files on a dedicated AWS web storage server of theirs and the names are easily accessible and sometimes guessable without any kind of security or ...
Matcha's user avatar
  • 111
0 votes
2 answers
121 views

Web request TLS

What version of TLS would be required for a router that separates client requests from a web server behind a router? Let's say the supported TLS client is 1.2 and so is the web server, BUT the router ...
cadobe's user avatar
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0 answers
158 views

Where is the safest place to put servers

Currently, I have modem with built-in NAT and DMZ. I have 250Mb of webspace and unlimited emails supplied by my ISP on WAN. I want to move the webspace to my own PC on a LAN along with the emails so I ...
Lonewolf's user avatar
0 votes
1 answer
1k views

Does a DDoS Attack affect the internet connection apart from the service it's attacking?

Lately I've been experiencing some crashes related to my internet connection, I'm on the process of pin-pointing what is causing the issue and one of those possible causes might be a DDoS attack, ...
Kevin Mac-Ginty's user avatar
0 votes
1 answer
423 views

Trying to understand HTTP request containing base64 encoded part and email address

I have public webserver serving static html pages and when analyzing error logs I found type of attempted GET that I don't understand. They are formed like this and fail because request is too long: /...
Madoc Comadrin's user avatar
0 votes
1 answer
134 views

How spamming entries in website database using the same IP address is possible?

I am working in a private company as VAPT Auditor. I am currently testing one of our project website which contains common features like login, sign up, etc. I mostly do manual testing using BurpSuite ...
Solo's user avatar
  • 41
1 vote
1 answer
387 views

Is my website under attack?

I have a web server. I was investigting why my nginx is keep crashing. I noticed a few other issues in my logs. Note: In the log report, I replace the name of my website with example.com and my second ...
martiz's user avatar
  • 11
1 vote
1 answer
414 views

Is running PHP file_get_contents on random user-generated links safe?

In one of my PHP apps, I have a part where it scrapes the content of random links on the internet using file_get_contents, and then it runs a regex on this content to find all the email addresses in ...
Syed M. Sannan's user avatar
1 vote
1 answer
152 views

"Pass-through" website interception detection and prevention

I face some sort of "MitM" attack type that I don't really know how to search, because I don't really know what it is called, so I am in the dark here, and need some help and advice. Let's ...
Iraka's user avatar
  • 13
1 vote
2 answers
130 views

Are there any attack vectors against the Smarty-PHP template engine when using a trusted template?

This is actually a general question about template engines. If I use Smarty-PHP to generate a website, and the templates and content are both created by me (assumed non-malicious), does this create ...
Drew's user avatar
  • 135
0 votes
1 answer
157 views

Parse a File on Client and Send to Server Without Client Manipulating Data

I have a desktop app that takes a file format and parses it to get some JSON data that is then send to a server. My problem is figuring out if it is possible to somehow parse the data on the client ...
dacite's user avatar
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0 votes
1 answer
330 views

Server Side Template Injection (SSTI): Difference between plaintext context and code context?

I am learning pentesting, currently studying Server Side Template Injection. I understood there are two types of SSTI - plaintext context and code context - but struggle to understand what exactly is ...
Sven's user avatar
  • 125
0 votes
0 answers
688 views

Do I need https for a web server that will be used locally? [duplicate]

I have a web server that will be used to manage the stock of a warehouse in a factory. The web server will be accessed only locally so the clients can update and view the available stock. The server ...
uzer123's user avatar
3 votes
1 answer
801 views

Is there a reason for a server-side limit on the number of HTTP headers allowed for each request?

The security team at my company has set a limit on the number of headers a HTTP request can contain (not header size, but an actual hard count limit on the number of headers). A vendor has added a few ...
Jessica's user avatar
  • 133
1 vote
1 answer
196 views

What is <title>(.*?)<\/title> and how the attacker use that?

I had a log from my web server like this [28/Aug/2022:12:57:02] "GET / HTTP/1.0" 200 1684 "" "<title>(.*?)<\/title>" What is this meaning and what exactly ...
Dita Aji Pratama's user avatar
0 votes
1 answer
178 views

Is HTTP Request Smuggling domain/subdomain wide or directory wide?

I have a pretty good understanding of HTTP Request Smuggling vulnerabilities but one thing I still need some clarification on is if they are domain/subdomain wide or directory wide? Here's what I mean:...
ex7lted's user avatar
  • 50
0 votes
1 answer
168 views

Site "can't" change username, why? [closed]

There's a website I have an account on, and I needed to change my username. They said they were unable to change that. I requested to just have my account deleted, and then I would create a new ...
Thomas's user avatar
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1 vote
0 answers
221 views

Why is it a security concern to modify http.sys registry entries to allow web service to accept a longer query string?

I have an Http web service running on IIS. The Http service will be exposed to the public internet, but only authenticated client requests will be processed by the web service. The service allows ...
hpatel's user avatar
  • 11
1 vote
2 answers
853 views

What is the effect of the "&x=" in a SSRF? Is it something related to encoding?

I'm learning SSRF. I learnt that typing &x= kinda turn off the rest of an URL (like https://some.website.com/user?id=9&x=.website.com/api/item?id=9) Everything that comes after the &x= ...
Ezau's user avatar
  • 13
0 votes
1 answer
776 views

What is the intent behind these unknown HTTP Requests into my AWS Web Server?

I know about the usual port sniffers and mass scanners that just pop up on any web server, but this one looks interesting to me. I figured out so far that those requests aren't really an issue for my ...
Flying Thunder's user avatar
0 votes
1 answer
232 views

Can attacker gain access to my private network application through pivoting and/or lateral movement?

I am using a public wifi network. When I start a nodejs express server at my local system at port 3000, I can access that website on another device (that is connected to the same public wifi network) ...
an0nhi11's user avatar
0 votes
1 answer
79 views

Do I need to set up super global SESSION for a web form?

I am building a web form in PHP, is just for the user to request information about my services or send comments, so I don‘t need the user to be logged with a username and a password, no databse. I ...
limakid's user avatar
0 votes
1 answer
892 views

Why is Nessus report HTTP running a web server on port 80 when I'm sure that it isn't?

From a Nessus scan I have the following output regarding HTTP and the use of port 80: Info N/A 43111 HTTP Methods Allowed (per directory) Info N/A 24260 HyperText ...
Sjim49's user avatar
  • 23
2 votes
1 answer
273 views

Is it safe for website to generate fake profile pages?

Today I found a website which generates a fake profile when asked if said profile exists. Example: www.site.com/user/mycoolname doesn't exist yet. But if I put it in the browser for the site I get a ...
Phaidrin's user avatar
0 votes
1 answer
678 views

Do WSGI servers connect to devices outside of the network?

I want to set up a plotly dashboard and view it from my browser. Plotly gets set up as a flask application. I'm of the understanding that I should use a WSGI server to host it. I'm looking at waitress ...
Cauder's user avatar
  • 101
0 votes
1 answer
76 views

Recommended secure option for uploading files to web server from a dynamic IP?

I need the best way to access a webserver to upload/modify a PHP script. The website contains very sensitive information, gaining unauthorized access to this server and modifying files would lead to ...
user1324762's user avatar
0 votes
1 answer
812 views

Url only works from the browser it is generated from. Copying it into a Curl Command fails, and gives a 403 error. How can I fix this?

I am doing some web scraping for streaming files, .m3u8 mime type. In this particular instance, I can't create a functional request that does not end up with a 403 Forbidden error. How to reproduce: ...
Jannies - They do it for free's user avatar
0 votes
1 answer
80 views

Multiple random requests for Non-Existent URLs from a single IP resulting in 404s

We sometimes get to see this behavior from a single IP address/logged in user - There are a lot of hits on our server that have .png at the end of the URL which results in a 404 because we don't have ...
Pranav's user avatar
  • 1
0 votes
0 answers
14 views

How to detect web account vulnerability [duplicate]

I know I might take a lot of flack for asking this basic question, but I hope you'll be patient with me. I was looking at a few websites and analyzing the payload when sending a POST request to login. ...
Robin Sage's user avatar
1 vote
2 answers
125 views

Securely storing password and encryption key on AWS

I have an EC2 Webserver on AWS which has a MYSQL database. The login data is stored on AWS using the Secret Manager. I have added an IAM role for the Server to get access to the password and an ...
JavaForAndroid's user avatar
7 votes
3 answers
4k views

Do we need to check for cross-origin on server side?

Modern browsers don't allow cross-origin requests - those must be explicitly allowed by CORS headers. But looking at Java back ends like Tomcat/Spring MVC I see that it's possible to reject requests ...
Stanislav Bashkyrtsev's user avatar
0 votes
3 answers
330 views

successfull log4j exploitation, or just normal traffic?

First, thanks in advance and sorry if I'm asking some really silly thing, this is not my expertise :) I have a webserver just for testing my things. Last week I checked if it was vulnerable to log4j ...
dalaix's user avatar
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