Generally this header reveals the internal IP address of the configured gateway or proxy as shown below. Prevent MIME types of security risk by adding this header to your web pages HTTP response.
With the mod_security approach you can disable all of the modules directivesfunctions in the modsecurityconf file and leverage only the server header ID directive without any additional baggage.
Web server http header information disclosure apache. Using the Registry key. ı dont want to turnf off etag. ETag is an HTTP response header that allows remote users to obtain sensitive information like inode number child process ids and multipart MIME boundary.
Description The HTTP headers sent by the remote web server disclose information that can aid an attacker such as the server version operating system and module versions. For example it takes one line in apacheconf to reduce an httpd Server header to Apache but the addition of a proxy to reduce it further. The remote web server is affected by an information disclosure vulnerability due to the ETag header providing sensitive information that could aid an attacker such as the inode number of requested files.
You can see ETag by checking HTTP response headers in Firebug. Http-security-headersnse Script Arguments. Disclosing the version of Apache running can be undesirable particularly in environments sensitive to information disclosure.
UrlScan requires IIS6 Metabase compatibility to work. Limiting Information Provided by IIS. For example in the screenshot below we can see that the Content-Type header is set to texthtml so the browser parses the HTML and shows the output.
The above solution would still not allow you to hide the fact that you are using Apache since the Server HTTP header will still say Apache. This HTTP response is header is distributed by gateways and proxies present between the client user agents – browsers and the web server. Create a DWORD entry called DisableServerHeader in the following Registry key and set the value to 1.
Web browsers know how to parse the information they receive from the Content-Type HTTP header which is sent by the web server in the HTTP response. A problem has occurred. Apache Web Server ETag Header Information Disclosure.
ETag is enabled in Apache by default. Information disclosure through server response headers Apache-Coyote X-Powered-By JBoss. Set to force GET requests instead of HEAD.
Microsoft provides UrlScan which can be used to remove server information from HTTP responses sent by IIS. In that case it seems safer to stick with the minimal line rather than add an additional element which may introduce its own flaws. Solution Change the Apache ServerTokens configuration value to Prod See Also.
Historically web servers have included their version information as part of this header. The basic functionality of Via header field is to track message forwarding avoid loops during processing and identifying protocol capabilities. Aside from modifying the Apache HTTPD source code or using mod_security module there is no other way to fully suppress the server ID header.
This is a good deal of information for attackers to exploit vulnerabilities and gain access to your web server. On most of the big companies or companies where security is not a must but also there are audit procedures they have periodic checks specially meant for the web applications where alarms may raise such as the Poodle and others related to SSL. Local File Inclusion Vulnerabilities OR Directory traversal attack HTTP Host Header Injection Apache 24 Restrict application Accessible by IP Address HTTP Host Header Injection Apache 24 DisableRemove Server.
To avoid showing Web sever information we will show in this article how to hide the information of Apache Web Server using particular Apache directives. Performs a HEAD request for the root folder of a web server and displays the HTTP headers returned. ETags entity tags are a well-known point of vulnerability in Apache web server.
The IIS server will also expose its version in HTTP responses. The HTTP spec recommends but not requires that web servers identify themselves via the Server header. Created attachment 33051 pcs dss screen capture Hi ı use apache serverour website scanned by PCI DSS.
The two most-frequently reported information disclosure vulnerabilities involve the Tomcat version being reported in the Server HTTP Response header and default error pages that report server type and version details. However you can change it to whatever you want using modSecurity. Having this header instructs browser to consider file types as defined and disallow content sniffing.
Lets see how to advertise this header. Description Apache HTTP Server 22x through 2221 does not properly restrict header information during construction of Bad Request aka 400 error documents which allows remote attackers to obtain the values of HTTPOnly cookies via vectors involving a 1 long or 2 malformed header in conjunction with crafted web script. The best one is to use the third option.
How To Modify the Server Header You can modify your tomcat serverxml and add a server option and set it to whatever you want. There is only one parameter you got to add nosniff. Apache Web Server ETag Header Information Disclosure Weakness how to fix this problem.
Apache header info version Apache24. 13 Useful Tips to Secure Your Apache Web Server. There are three ways to remove the Server header from the response.
The remote web server discloses information via HTTP headers. The server IDtoken header is controlled by ServerTokens directive provided by mod_core. Solution Modify the HTTP ETag header of the web server to not include file inodes in the ETag header calculation.