Questions tagged [webserver]

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

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46 views

How to access Web server 2012 IIS default page from Kali Linux? [on hold]

I want to access the IIS default home page from Kali Linux. Current configuration: Vmware consists of Kali Linux and windows webserver 2012. IIS service is running on web server (able to access ...
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38 views

Hacking attempts to our server - what does this code do? [duplicate]

Every so often I go back and check our server and find random files uploaded to the domain root directory. They are seemingly cryptic and have names like css2.php db_model.php ....
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1answer
43 views

Reverse proxy isolation from insecure blog, are sessions vulnerable?

Hi I have a WebApp where security is important. E.g. www.somewebapp.com The app has a wordpress blog (hence not secure since wordpress). e.g. www.somewebapp.com/blog To protect the webapp from ...
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27 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 ...
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1answer
53 views

Passing user ID as parameter without any authentication, what are the security risks?

I've read that passing GUID as URL parameter isn't considered insecure because usually, an app has an authentication mechanism (checking against some session token). However, how secure would an ...
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2answers
153 views

Why does localbattle.net point to localhost?

I found a random link on a forum linking to localbattle.net, at the same time I was running a local server on localhost. When I went to localbattle.net, my local server page appeared! The certificate ...
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4answers
126 views

Generate Fake Encrypted Data

I want to create a file server that will be serving encrypted files without permissions. It would be really awesome if it were impossible for a hacker to tell if a file exists or not, so I am thinking ...
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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?...
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1answer
92 views

File upload security with PHP - Header to text/plain

I am using PHP to create a small script that uploads images to a server. While going through the PHP documentation, I found a contribution from user CertaiN that gives a very clear example of how ...
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26 views

“GET //libs/js/iframe.js HTTP/1.1” 200 2305 “-” "python-requests/2.6.0 is it a try to hack into my server [duplicate]

Just Received a request in my nginx log 77.247.110.141 - - [16/Jun/2019:14:03:58 +0000] "GET //libs/js/iframe.js HTTP/1.1" 200 2305 "-" "python-requests/2.6.0 CPython/2.7.5 Linux/3.10.0-957.12.2.el7....
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2answers
115 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 ...
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2answers
147 views

Using fail2ban for detecting suspicious activity whitin a webserver

I know that fail2ban is mostly used for blocking IPs trying to brute force an SSH endpoint and other stuff like that. However, I am wondering if you could also use fail2ban to detect (not necessarily ...
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1answer
55 views

Unusual Get/Connect requests to Apache [duplicate]

Not sure if that has been asked before but over the last week I am getting hundreds of CONNECT and GET requests to my Apache web server for domains that are not on my server. Some are for well known ...
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1answer
48 views

Tracking script creates vulnerability

I am using a third party service that provided a tracking script which when embedded in the page seems to create some kind of vulnerability as occasionally people are redirected to a phising link ...
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2answers
103 views

How does a hacker get access to my files if he got access to another user's files on a shared server? [closed]

I host files on a shared server with Ubuntu 14.04. How does a hacker get access to my files if he got access to another user's files and how do I prevent it?
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2answers
105 views

Burp Suite's keeps my ip safe?

I am starting to learn how to use Burp Suite, but since it is kind of (tho I know it does more) automatic way of plugging information into a website/form, should I still use proxychain/vpn to keep my ...
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182 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 ...
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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 ...
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1answer
257 views

How to hide webresource.axd and scriptresource.axd file?

I am getting an email from the security team, saying that webresource.axd and scriptresource.axd are visible. How do I hide it ?
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35 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/...
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1answer
91 views

Two Factor Authentication Secret Storage

I found this NPM package that looks like can be used to verify two factor authentication for websites, and also generating tokens for signing into other websites. In the README there is a section ...
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1answer
299 views

How can I find a web application's document root using a path traversal vulnerability?

I am performing a penetration testing on an application hosted on an Ubuntu environment. So using a path traversal vulnerability, I can download any file. The API web application runs as root (...
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1answer
89 views

How to determine where an attack came from? [duplicate]

I've noticed sometimes that I'd receive very random requests coming to a live server that I'd be hosting in realtime through my log. It would usually look something like: [14/Mar/2019 02:05:36] "GET /...
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1answer
64 views

Pure-ftpd connections from unknown IPs

I'm seeing unknown IPs in results like this in the messages log on a CentOS 6 webserver, are these IPs actually accessing the machine? Mar 13 19:11:49 server pure-ftpd: (?@some.ip.here) [INFO] New ...
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1answer
160 views

how to check if remote host is running LDAP server?

I am currently pen-testing a remote website (its mine) I would like to know if its possible to test if the web-server is running LDAP server. I tried Nmap with no luck(it lists every port from 1 to ...
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38 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 ...
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0answers
51 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 ...
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1answer
218 views

a mysterious & pointless long-term hacking attempt?

It seems that I am the target of a mysterious ongoing hacking attempt. I have several domain names, most of which are currently parked & pointed at a single ‘main’ website. For the last couple ...
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2answers
163 views

Why are top-level wildcard bindings unsafe?

Microsoft has the following to say about configuring asp.net core with http.sys: Top-level wildcard bindings (http://*:80/ and http://+:80) should not be used. Top-level wildcard bindings create ...
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0answers
60 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 / ...
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0answers
29 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 ...
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0answers
148 views

Node.js Cookies/Tokens (Access & Refresh) - OAUTH2 - How to store tokens and time/function refreshing

1) I am currently building a RESTful API which acts as a middleman between clients and an authentication server. A client gives me some account details and my server passes them to the auth server who ...
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5answers
102 views

How to stop a request for an external image from exposing my IP to the server hosting the image?

Suppose I have a server A, and that there is a website W hosted on A. The HTML of W contains: <img src=https://www.domainD.com/testT.jpg> Then I have a computer C, that accesses W. Will ...
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1answer
134 views

Is my server under some kind of reconnaisance/attack?

Recently, I started up nginx on an Amazon EC2 instance. After a day, I started seeing these messages in my log. Some client keeps trying to call /add and /health.html on my server. I don't have those ...
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1answer
99 views

Should I treat my SSH username like a secret?

I'm trying to automate the deployment of my blog. Most CI providers are using virtual machines/Docker containers with Linux, so I'm learning about shell scripts and SSH now, which is all new to me. ...
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1answer
146 views

My website got blacklisted as “phishing”. Any hints on how to avoid that?

I have a personal website hosted using my provider's DNS name (i.e. myname.provider.com) on my personal hardware at home. The web server (both HTTP and HTTPS) is Apache on Debian Wheezy (which is ...
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96 views

server logs invalid HTTP_HOST header, Bad request, 400 [duplicate]

I created a Digital Ocean droplet recently, to learn how to make Django app. Eventually they say I should use Gunicorn to serve and Nginx to face the world, however, in very early stage of learning ...
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1answer
51 views

Vulnerability in Composer/MeekroDB WhereClauseTest.php?

I have a development webserver for which the domain is not published or used (legitimately) by anyone other than me. However, I'm seeing hits in my access and error log for the following file from ...
2
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1answer
120 views

Security Log Analyze [closed]

is there any tools that I give it web server log (like Apache web server) and analyze it if there was any attack or not? I don't want to use SIEM.
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1answer
186 views

Server getting probed: why can I see successful GET requests to other sites?

I put up my site yesterday and this morning I saw a lot of requests in the logs. I have seen this before, and immediately could tell it was someone/something probing the server. Most of the requests ...
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3answers
5k views

New Linux virus “watchbog”. What could be the cause? [duplicate]

This question had already been brought up here, but was poorly answered with generic answers, like reinstall everything and no actual solution and cause. So here's my story: There is a new virus out ...
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2answers
56 views

Is an open source web application server publishing it's version at a public endpoint a security issue? [duplicate]

If an open source web application is publishing the version via a public, non-access controlled API/Header, is it considered a security issue? The premise of the question is that, if a particular ...
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1answer
40 views

Best practice for config files for ec2 instances

I am building a lamp server ec2 image for a project we are doing. These images will be in an autoscaling group and on startup will be running startup script. THere are some config files that have ...
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1answer
70 views

Deny access to IIS Server from IP local range

I have a local IIS 10 Server, this server runs a critical application. I want to deny access for this server from IP local network and allow only 2 or 3 IP-addresses. Additionally I want to log any ...
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0answers
52 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 ...
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2answers
186 views

Website is behaving strangely - was it attacked?

Our website was behaving strangely. Sometime it was down and nothing was accessible. Sometime it started loading but pages browsing was too slow. We checked apache logs and found the below ...
3
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3answers
240 views

A protocol for encrypting the data on the server, but with a password on a mobile device

I want to implement the following encryption scheme. The data is created and stored on a web server, but related to some user of the system (i.e. it is entered "on behalf" of the user). Both ...
2
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2answers
158 views

Can hacker delete my server files and database where I am using below function?

I want to know how to protect my website from hackers. I am a php-mysql developer. For fetching data from databases I always use MySQLi. For preventing my website from SQL injection, I always use PHP'...
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1answer
73 views

How can we find server location and IPs? [closed]

Is it possible to find where some known application servers (such as whatsapp) are located and their IPs ?
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2answers
94 views

Encrypt but not verify sender identity https without nagging user?

I have a five or six personal websites that I would like to send over https so isps can't inject ads. They're nothing sites hosted on a $60/year shared server. If I want to buy a https certificate I ...