Questions tagged [webserver]

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

43 questions with no upvoted or accepted answers
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6
votes
1answer
185 views

What is the proper terminology and base CVSS score for the following cache related behaviour?

An interface (website/application) that requires authentication should have a proper HTTP caching mechanism. When it doesn't, it allows an attacker to browse back after logout or read the cache in ...
4
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0answers
89 views

Is an out-of-band request via DNS by abusing the X-Forwarded-For header exploitable

By changing the X-Forwarded-For header in a request, I am able to have it sent an OOB interaction with Burp Collaborator requesting a DNS lookup of type A. Is there any risk to this vulnerability or ...
3
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0answers
365 views

Memory and CPU usage during a denial of service attack. How to understand the data?

The Debian crontab file that is a web server Apache has the line: */2 * * * * echo -e "`date`\n\n`free` \n\n`vmstat`\n" >> /home/hacker/free_vmstat_output.txt I ...
3
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0answers
913 views

Do I need DNSSEC from GoDaddy?

I just registered a co.uk domain with GoDaddy. I've been managing domains for a few years now, and hosting my own website. I know a bit, but not enough to be safe with anything important like this. ...
2
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0answers
432 views

Can XXE be exploited when disallow-doctype-decl is set to true (Apache)?

I found out that an endpoint of a website may be vulnerable to XXE. It is using Unmarshal as an XML parser. When I try to send a post request using common XXE payloads, I receive the following ...
2
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0answers
95 views

How to securely manage generating files on the client-side to download

While searching for a way to convert an HTML table to .CSV file, I found there are 2 ways to generate files to download on the client side with JavaScript: using data URLs by generating the file on ...
2
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0answers
777 views

How to validate Excel data to protect against XSS?

My application is dynamically constructing a source URL and then writing the resource file (Excel) directly to the response. The URL is read from a properties file, based on the application ...
2
votes
1answer
799 views

How to inject XSS using Response Splitting in the following scenario?

I have been pentesting for a company. I found a CRLF injection that could be done using %E5%98%8D%E5%98%8A instead of %0d%0a. So I'm using %E5%98%8D%E5%98%8A in redirection parameter for CR/LF. Here ...
1
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3answers
101 views

Can DirBuster list all website links or information displayed on a static website?

I am in the process of looking for a specific keyword on a particularly large website with lots of pages. I'm thinking I'd have better luck if I have a way to see the links within the website. If I ...
1
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0answers
28 views

Securing multiple systems accessing the same data

I'm hitting a roadblock when it comes to security for managing scoped permissions for servers. Right now I run a community which can create sub-servers. So community A can allow certain users to ...
1
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0answers
73 views

How to treat SSN passing through web server

I am working on a platform that does temp labor and we are needing to run background checks. That means collecting scary data like SSNs, Names, Addresses, Dates Of Birth, and sending them to the ...
1
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0answers
63 views

Why is digital signature enforcement on webservers not common practice?

Why is it that server admins do not code sign the contents of their webservers (all php, css, js, etc.) and have Apache / NGINX / whatever server software refuse to execute or serve any code / ...
1
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0answers
38 views

How much VirtualBox device/ios emulator/blueStacks informatin can be logged/tracked by servers/ apps?

This question is intended to know if we can be tricked by Virtual devices emulators. How much logging information can servers/apps request to tell the difference? In the other word, Can we hide our ...
1
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0answers
104 views

Trust boundaries for webapps (vs desktop apps)

I am currently working on fixing some security problems with our webapp as reported by VeraCode. Some of these pertain to "trust boundaries", i.e, what inputs can be trusted. In some cases, our ...
1
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0answers
45 views

Rotating session names vs a static session name with a rotating validation string

I'm building my own session management library in the Go programming language and I had an interesting idea to save memory. I created something called an overseer that looks for expired and abandon ...
1
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0answers
122 views

Protect website against attacks with iframe for user generated javascript?

I'm creating a small playground for people to write and test out their JavaScript on my website. I know websites like jsfiddle already exist but it's just for fun and for the sake of trying something ...
1
vote
1answer
317 views

How does a user get authenticated on server B if they are already authenticated on server A through OAuth2?

Lets say I have server A (a web server). Users initially use an external provider such as Google to get authenticated on that server. An entry is created in my database saying that this user has ...
1
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0answers
22 views

How can I study/replicate multiple vulnerability types in a specific software?

I'm interested in studying the effects (crashes, signals sent, logs, etc.) of different types of exploited vulnerabilities (DoS, ROP, remote shells, etc.) in specific software (particularly webservers ...
1
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0answers
177 views

Bizarre HTTP requests to VPS, former malware command and control server?

I just bought a new VPS with Linode. I installed Apache and noticed some very strange behavior that I have been seeing consistently throughout the logs. So basically, I keep receiving stranger HTTP ...
1
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0answers
26 views

Information and Settings Collected from a PC Connected to a Web Server

1- What are the information and settings collected from my pc when I connect to a website server? 2- When I connect through a VPN, Could the website server detect a mismatch between my new location ...
1
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0answers
94 views

Possible vulnerabilities in private chat application implemented using web broadcasting

I have never used web-sockets but I am working in a PHP framework which has builtin broadcasting facility. This broadcasting use web-sockets technologies named Redis and Pusher. The workflow of this ...
1
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0answers
76 views

Does standard configuration in Tomcat pose any security risk?

I have a simple test website on Tomcat running on RaspberryPi. Pi is behind a router. Port forwarding is on and I can access the website from the Internet. What are the security risks of standard out ...
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0answers
58 views

How to manage security for multiple PC and VM?

I have a firewall VM which creates I have used to setup subnet for different purposes. For example: (fake ips, of course) 1.1.2.1/24 DMZ 1.1.3.1/24 Internal 1.1.5.1/24 security/logging I use ...
0
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1answer
36 views

TLS integration of webapplications

Let's say I am a developer/maintainer of an open-source-webapplication distributed via docker. Any server-admin can install (using docker) and host this webapplication on his server with his own ...
0
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0answers
45 views

Is it possible to know the keep-alive time supported by a web server?

I'm testing a web server that may be vulnerable to denial of service because of the time server keeps alive conections of the clients, I found that in a qualys report I launched against the webapp. I ...
0
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0answers
43 views

Dreamhost hosted wordpress site attacked - SSH password was changed - Need help assesing attack vector

My client had his wordpress site attacked, his site is not a juici target, the attack consisted in redirecting the site to another site. That in itself is no surprise, the weird thing is that both the ...
0
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1answer
86 views

Paths in web servers

Using sqlmap I was able to gain access to one database and using --current-user and --privileges. I can confirm that the user is root@localhost with full privileges. The part I have problem with is ...
0
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0answers
26 views

E2EE through a browser for multiple users and devices in a many-to-many scenario

I've multiple IoT devices that read and write streams of data (audio/video signals, sensory data, ecc...) and multiple users that can do the same, I should be able to interchange informations from one ...
0
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0answers
49 views

Hacking Attempt Requests Not showing Up on Webserver Logs But Google Analytics Shows it

Which hacking tool makes a request and does not show up on web-server logs? /en/latest/ has been requested over 116, we don't have this URL on the website at all! The request to that URL does not show ...
0
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0answers
243 views

Can someone explain the 'IE No Open' X-Download-Options Header, as enforced by Helmet.js?

I've been preparing to deploy an Express server using Helmet.js for some added security. I've been reading through their docs to make sure I understand what I am doing here, and I don't understand one ...
0
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2answers
214 views

How to detect malicious files or web shell on a vps web server

How is it possible to detect malicious files or web shell on a vps web server? I used to use a shared hosting, and when I tried to upload any malicious code for testing it got deleted automatically. ...
0
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0answers
93 views

Can you use a domain to forward web traffic at DNS to another domain but still use the MX record for this domain

What I am attempting to do is ensure all ingress web traffic [http(s)] to exampledomain1.com forwards to exampledomain2.com but I still want to use the MX record of exampledomain1.com to point to at ...
0
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2answers
142 views

What are the risks of using non-ssl connection between server and (externally hosted) database?

I am building an application using AWS Lambda and using a MongoDB database hosted directly with MongoDB (Atlas). For some reason, I get an error when trying to connect via SSL and I've been working on ...
0
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2answers
120 views

Is it safe to publish a REST API client on npm even though the API is not intended for public use?

I am build a website in Angular which communicates over my REST API on my backend server. I have managed to auto-generate the code (TypeScript) for my client and now I need it to be available on ...
0
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0answers
59 views

Returning Social Security Number After Validation Checks on Web Based Form

I have a web based application form that is used to gather personal information for web based users. One of the fields is an SSN. My question is simple, in terms of security compliance (in general, ...
0
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0answers
36 views

Apache - Adding Redirect to sub-directory V/S changing DocumentRoot

I want to understand security implications of changing DocumentRoot in Apache to an installed website versus adding a RewriteRule. The reason I ask this, I have a website that is installed under /var/...
0
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0answers
41 views

Retrieve hostnames for IP addresses to connect to HTTP services, when no (reverse) DNS PTR records are available?

I'm conducting a penetration test, where I'm facing the following problem: After having retrieved a set of IP addresses through tools like whois, I cannot successfully connect to the HTTP-based ...
0
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0answers
148 views

Honeypot URL and reporting site

Is there some sort of tool list that can work with Apache/NGinx/etc that has a list of "honeypot" URLs such as /HNAP1/ that when it gets detected in the logs of the web server then it will ...
0
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0answers
196 views

shared hosted web server used as forward proxy

When setting up personal anonymous forward proxy server, different hosting can be chosen. In the case of shared hosting, web server, transformed into proxy server, shares it's IP with hundreds of ...
0
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0answers
165 views

Can I use process crash information to detect buffer overflow attacks?

Buffer overflow is a very common vulnerability, often targeted with zero-day exploits. Successful attacks often result in arbitrary code execution, while failed attempts tend to crash the target ...
0
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0answers
38 views

Verify which file a request to the server originated from

In order to make my question clear I will give a practical scenario. Lets say I have a server where I allow people to upload a script and allot them part of my drive, the script can make requests to ...
0
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0answers
168 views

Securing my API: concept of access tokens

First of all I want to excuse for the bad spelling and grammar. English is not my mother tongue. I have built a JSON communication between a front-end (website) and my Node.js web server. I want to ...
0
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1answer
89 views

Is it a risk running old modules on Apache?

I just saw that my hoster is running extremly old modules on Apache. The cURL Version is 3 years old, the SQLLite is from the 24th October 2014 and the zlib version is 1.2.8 instead of 1.2.11. Also, ...