Htaccess .htpasswd hack

However, PHP dynamic images can be used to deceive the server into believing it includes rofl into the page instead of sly. PHP script output can be made an image, and it will also run the harmful code together with it. This will prove handy, for the attacker, in gaining the details of the exact location of the user or even make tailored payloads to exploit the browser of the user.

For instance, if you have a website with your profile, and you have the provision of setting the profile image from a remote URL, then you can add rofl.

And htaccess will redirect it to the PHP script, further outputs an image; this deceives the server to believe that sly.

Besides, the rewrite rules put into use for this, AddType may also be used for this. In case an attacker has successfully gained access to a website and also has limited access, despite this he has access to make changes to htaccess, then this can be put into use for a myriad of exploitation cases. Let us understand with the help of an example as to how an attacker can perform a watering hole attack by making changes to htaccess.

If an attacker wants to target someone and he is well aware of his IP address along with the websites that the user frequently visits, then in this case watering hole attack can take place. For instance — let us assume that the attacker wants to target a user with IP address: In case the attacker finds a way to overwrite the htaccess file, for instance — then the attacker can easily set up a htaccess rule like —. Considering the example mentioned above, a random user visiting the website xyz.

The victim will be redirected to a website which is similar to the one that the victim wanted to visit in terms of design. However, he will be redirected to a unique page on the website which will serve the malware. If done correctly, there is no way that the victim will get a clue that anything out of the ordinary had taken place. The victim will continue browsing the website not knowing that he has become the victim of a watering hole attack.

If planned out properly, this can turn out into a highly sophisticated, targeted attack against someone while they remain unaware of what has taken place. Commonly, there are two forms of information disclosure using htaccess files. Out of these two, access to the compromised server is required for one, but there is no such requirement for the other one.

It has been seen that htaccess files can be easily read by anyone as there is a dearth of default deny rule or server misconfiguration. You will be amazed at what information you will be able to disclose and you will also be surprised to know how frequently you will come across websites which have not configured their server or HTTP their htaccess file.

For context —. It pays to check whether you can read. To do this, all you need to navigate to the following URL on the website you are testing —. Usually, you will receive an HTTP response, however, there are cases where you will be able to read. Note — It is not mandatory that the file name will be.

Therefore, depending on the type of CMS that the server is using, at times it pays to check for. Here is an example with Joomla —.

The second method is far more effective where the attacker enjoys limited access to a server. Let us assume; they are not able to edit the files; however, they can edit the. Besides evading the limitations like PHP safe mode, the attacker can also use it to reveal the information on the server.

The htaccess file must contain the following lines and be placed in the folder with the content to protect:. The above will protect an entire folder, if only specific files should be protected replace the line require valid-user with:.

For the system to work the correct path to. The absolute path to the file on the server must be used and to obtain this you can upload a file to the directory where you're going to store. How to Install phpmyadmin Amazon ec2 Ubuntu. How to Install Flask on Ubuntu How to Create Directories in Linux using mkdir Command. How to Install Netbeans 11 on Ubuntu How to Install Python 3. Filed Under: Linux , Ubuntu.

Author Admin My name is Devendra Dode. Leave a Reply Cancel reply Your email address will not be published. The server will service the request only if it can validate the user-ID and password for the protection space of the Request-URI. There are no optional authentication parameters. Upon receipt of an unauthorized request for a URI within the protection space, the origin server MAY respond with a challenge like the following:.

A proxy may respond with the same challenge using the Proxy-Authenticate header field. To receive authorization, the client sends the userid and password, separated by a single colon ":" character, within a base64 [7] encoded string in the credentials. Userids might be case sensitive. If the user agent wishes to send the userid "Admin" and password "open sesame", it would use the following header field:.

Information is freedom. Freedom is non-negotiable. Feel free to modify, copy, republish, sell, or use anything on this site at any time. The use of "hacker" to mean "security breaker" is a confusion on the part of the mass media. We hackers refuse to recognize that meaning, and continue using the word to mean someone who loves to program, someone who enjoys playful cleverness, or the combination of the two.

Password for the username. Realm or Popup Name.