Host header injection fix tomcat. It would be good if this option compared the Host header to hosts configured in Tomcat (as in the Hosts defined in server. 26 redirects all of the above to setHeader () which is implemented in the Coyote (HTTP) connector such that bytes What is an HTTP Host Header Attack? Learn how attackers exploit Host header vulnerabilities for cache poisoning, SSRF, and password reset poisoning. Let’s hide the product and version details from the Server header. Attackers can exploit this flaw to manipulate URL resolution, redirect Jan 5, 2016 · Fixed in Apache Tomcat 9. How easy it can be exploited depends on the client and the backends. If the browser fails to enforce security measures due to missing security headers, apps can be far more vulnerable to attacks like cross-site scripting and clickjacking, increasing the risk of unauthorized access, sensitive data exposure, and further exploitation by malicious actors. Nov 25, 2019 · Browsers send Host Header to inform about the URL client wants to visit. Jul 23, 2025 · Conclusion Configuring HTTP headers in Apache server is must for enhancing your website's security and performance. 2 Protocol enable for IBM WebSphere with SSL Handshake Debug Aug 11, 2010 · Tomcat now rejects requests with multiple content-length headers or with a content-length header when chunked encoding is being used. May 8, 2025 · A fast and flexible tool for fuzzing custom headers and finding vulnerabilities. AppendHeader either creates instances Host Header Injection occurs when attackers manipulate the HTTP Host header to bypass security controls, conduct phishing, or exploit internal services. 2 Missing Security Header (x-xss-protection) & Clickjacking Disable HTTP TRACE / TRACK / OPTIONS/DELETE Method. - OWASP/wstg Jun 16, 2022 · SQL , code execution,. xml specifying the url-pattern /* and in Server. Invicti identified a CRLF (new line) HTTP header injection. The safest and most secure measure that you can set in place is to avoid using the HTTP Host Header in the first place. This host name is also included in the HTTP request headers. M17 Fixed in Apache Tomcat 9. env file to your root folder and putting this: DANGEROUSLY_DISABLE_HOST_CHECK=true As the variable name implies, disabling it is insecure and is only advisable to use only in dev environment. Jan 20, 2025 · Remove Server Banner Removing Server Banner from HTTP Header is one of the first things to do as hardening. Off-the-shelf web applications typically don't know what domain they are deployed on unless it is manually specified in a configuration file during setup. Ensure you have the URL Rewrite module installed, Open IIS. HackStack delivers complete cybersecurity program orchestration, from asset discovery to penetration testing, with customized continuous protection for critical assets. com by making the following request: Sep 8, 2014 · I am working on "Host Header Injection" attack for one of my client. 4) SSL Medium Strength Cipher Suites Supported (SWEET32) [Tomcat Server] ETag vulnerability & X-Powered-By : jsp/2. A web server commonly hosts several web applications on the same IP address, referring to each application via the virtual host. Without proper validation of the header value, the attacker can supply invalid input to cause the web server to: Oct 1, 2013 · We also list the versions of Apache Tomcat the flaw is known to affect, and where a flaw has not been verified list the version with a question mark. Having a server banner expose the product and version you are using and leads to information leakage vulnerability. How Fastly helps prevent HTTP Host header attacks Follow Fastly’s guide on preventing cache poisoning to ensure additional protections are in place. . Check this post out to find out the steps to mitigate it: Do not disclose private IP addresses and routing information to unauthorized parties The Web Security Testing Guide is a comprehensive Open Source guide to testing the security of web applications and web services. The integrity of the Aptive explain Host Header Injection, a critical web security vulnerability that can lead to phishing, cache poisoning, and account takeover. HTTP Host Header Attacks: Exploiting a Critical Web Vulnerability The Host header, a seemingly innocuous part of the HTTP protocol, plays a crucial role in directing web traffic to the correct virtual host on a server. Here are the steps to fix this. Apr 26, 2017 · Since the Host header is untrusted information, we should likely consider whitelisting as a solution. Click Add Rule (s). This vulnerability pertains to the Apache Tomcat server, specifically when handling HTTP/2 streams. Discover how attacks occur, their risks, and effective mitigation strategies to help protect web applications. Jun 20, 2024 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. I want to detect and reject when a malicious user tries to fool the server and send the request to another subdomain using a Host Header, in this example, the user should be served by a. In order to test for this type of vulnerability, the first step is to supply an arbitrary domain via the host header. M19 Fixed in Apache Tomcat 9. M13 Fixed in Apache Tomcat 9. In an incoming HTTP request, web servers often dispatch the request to the target virtual host based on the value supplied in the Host header. To prevent Host Header Injection attacks, it is important to follow secure coding practices and configure your web server to use strict parsing rules and ignore unexpected Host header values. Dec 22, 2024 · Enabling secure header in Tomcat 8 is straightforward, and as an administrator, you should plan to implement them for better security. In short, the answer is yes, your application could be vulnerable no matter what kind of language/server you use. 4) Restrict application Accessible by IP Address & HTTP Host Header Injection (Apache 2. Jun 25, 2019 · Host Header Injection Description When creating URI for links in web applications, developers often resort to the HTTP Host header available in HTTP request sent by client side. Effect of the Settings: With these settings enabled, if a cross-site scripting attack is detected by the browser, it will attempt to Jul 11, 2020 · Tomcat ghostcat vulnerability (JBoss /Tomcat) SSL certificate supports Weak Ciphers/Encoding (3DES) (Apache 2. Most browsers only send relative links without the host, which makes this option pretty useless. Mar 29, 2024 · By following this SOP, we aim to prevent unauthorized manipulation of the “Host” header in HTTP requests, ensuring the server responds only to valid and expected domain names. Features A Host header attack, also known as Host header injection, happens when the attacker provides a manipulated Host header to the web application. M21 Fixed in Apache Tomcat 9. Features Feb 19, 2025 · Missing HTTP security headers can leave websites and applications exposed to a variety of attacks. But in some cases, this is not even required (as may be in your current Aug 3, 2023 · The objective of this Standard Operating Procedure (SOP) is to outline the steps required to implement missing security headers in an Apache web server. 4) TLS1. AppendHeader method HttpResponse. What you are describing sounds more lika a MITM situation, where the attacker manipulates a request sent by a victim client. Oct 17, 2023 · While reviewing the ASV (Approved Scanning Vendor) assessment report of our server, a host header injection issue was detected within certain applications. com and not b. If no match is found, the request is routed to the default host. Jan 13, 2025 · This guide explains how to secure your Apache web server against Host Header Injection attacks for maximum protection. By manipulating the host header value in an HTTP request Apr 16, 2025 · This is at least an Open Redirect vulnerability. The vulnerability affects the versions ranging: Oct 9, 2024 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. A remote attacker can exploit this by sending a fake header with a domain name under his control allowing him to poison web-cache or password reset emails for example Oct 9, 2024 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. Features Mar 20, 2025 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. Jul 22, 2010 · I've been looking at this for some time now and draw the conclusion that setting EnableHeaderChecking to true is in fact good enough to prevent http header injection attacks. What is Host Header Injection? Host Header Injection occurs when a web application improperly uses the HTTP Host header without proper validation or sanitization. Avoid using Host header alternatives and overrides such as X-Host or X-Forwarded-Host, and if you have to, follow the same recommendations provided for the Host header. 2 Protocol enable for IBM WebSphere with SSL Handshake Debug Feb 9, 2022 · This article explains why web servers are misconfigured, how to exploit Host Header Injection vulnerability to cyber-attacks, and mitigate host header attacks. If you are new to Tomcat, you may be interested in taking this Apache Tomcat administration course. This means that you can poison a Varnish cache with URLs pointing at evil. Features Alternatively, the web server may send the request to the first virtual host on the list. 5, this plugin no longer is necessary to fix the host-header security issue reported in Ticket #25239 finally is fixed, and mentioned in this post WordPress 5. Select the web site under which the MyID websites and services are installed. Addressing this concern is essential to Attacks that involve injecting a payload directly into the Host header are often known as "Host header injection" attacks. but it still send the redirect for some reason. This can lead to a variety of security issues, including domain hijacking, cache poisoning, and server-side request forgery. 0. Sep 22, 2021 · 3 This article along with this one outline protecting against this kind of attack (Client Access Server Information Disclosure vulnerability) by aborting requests which are missing the Host header. There doesn't seem to be another way to prevent Host Header Poisoning in Tomcat without implementing a Custom Valve or Jul 11, 2020 · Local File Inclusion Vulnerabilities OR Directory traversal attack HTTP Host Header Injection (Apache 2. M15 Fixed in Apache Tomcat 9. An attacker can use this practice by sending a fake header that contains a domain name. Is there any solution for this? Thanks Testing for Host Header Injection Summary A web server commonly hosts several web applications on the same IP address, referring to each application via the virtual host. My website is running on Tomcat 7, I tried some solution with set up the virtual host by point the unknown host to a defaultlocalhost which suppose to do nothing. Host Header Injection Protection An HTTP Host header attack is a type of web vulnerability where an attacker can manipulate the HTTP Host header of a web request to trick a server into responding to a request that was not intended for that server. Right now the onl Apr 15, 2025 · Unlock high-impact vulnerabilities by abusing HTTP headers – leveraging custom headers, cache poisoning, reverse proxy misconfigurations and other methods. Host header specifies which web application will process incoming HTTP request. An intermediary in the call modifying the headers. To protect your environment from the host header injection, define the list of hostnames or IP addresses that are allowed in the Host or X-Forwarded-Host header. Mar 20, 2025 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. In addition to that, Apache also allows you to use virtual hosting to mitigate host header injection vulnerabilities. And for versions of WordPress less than 5. M3 Not a If so, you can use this header to probe the application and observe what effect this has on the response. Features Jun 20, 2024 · As of WordPress 5. This allows multiple SSL configurations to be associated with a single secure connector with the configuration used for any given connection determined by the host name requested by the client. Nov 4, 2020 · What is Host Header Injection? According to layman term , host header injection is a web based attack where the attack provide arbitrary host header to the web application. M8 Fixed in Apache Tomcat 9. com/invalid-host-header/ and there are many solutions posted regards how to prevent Host header attacks like Learn about Host Header Injection attacks, their impact on web applications, and how to prevent them effectively. 5 Beta 4. Oct 15, 2019 · URL Rewrite rule to fix host header vulnerability In addition to the Host Header vulnerability, your security scan tool may flag “Disclosure of private IP address” finding as well. Read about password reset poisoning, which is the most common use of Host header attacks. Jun 29, 2017 · This is an old question, but for the sake of completeness, I'll add some thoughts. Double-click URL Rewrite. That said Given the wide variety of deployment architectures (CDN, reverse procy etc) if you do need to use the Host header, validation against a known trusted list is probably the most robust option. Oct 3, 2022 · If sent, the value of the header contains the Servlet and JSP specification versions, the full Tomcat version (e. May 31, 2018 · Our application has been checked by PEN Test tool, and there are description of issue: An attacker can redirect the application using the host header on the below mentioned URL to redirect them to phishing websites. 2. g. Features Mar 1, 2024 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. example. Double-click on URL Rewrite. Oct 10, 2025 · This page provides configuration reference for container-provided filters in Apache Tomcat 9, explaining their usage and implementation details. The consequences of such attacks vary depending on how a web app processes the Host header content. Jul 11, 2020 · Local File Inclusion Vulnerabilities OR Directory traversal attack HTTP Host Header Injection (Apache 2. Oct 10, 2025 · If sent, the value of the header contains the Servlet and JSP specification versions, the full Tomcat version (e. Then you can send an arbitrary host header while sending the request to the relevant Apr 26, 2025 · This line of code instructs the server to always set the X-XSS-Protection header. Feb 5, 2022 · Preventing Host Header Injection Attacks Fortunately, Host header injection attacks are not unavoidable. This means the input goes into HTTP headers without proper input filtering. 5. Supply an arbitrary Host header When probing for Host header injection vulnerabilities, the first step is to test what happens when you supply an arbitrary, unrecognized domain name via the Host header. May 1, 2013 · Varnish uses the first host header it sees to identify the request, but Apache concatenates all host headers present and Nginx uses the last host header [1]. How to avoid host header injection in Apache Tomcat server? In Apache/Nginx, as a reverse proxy to your tomcat server, create a dummy virtual host that catches all requests with unrecognized Host headers. com Host: someotherdomain. Tomcat extracts the host name from the HTTP headers and looks for a Host with a matching name. Attackers can temper Host Header to manipulate how the application works. Mar 17, 2019 · In a host header injection attack, the attacker is the one that sends the request. This type of vulnerability can be exploited by attackers in several ways, including password reset poisoning and web cache poisoning, potentially leading to a wide range of attacks. Sep 12, 2023 · 同事分享資安知識一則：在網頁引用 Host Header 可能形成資安弱點，給予攻擊者操作重新導向或引用惡意程式的機會。 特筆記備忘。 Sep 18, 2016 · Hi! Hope you guys are doing well. Apache Tomcat/10. By following certain security measures, you can protect your web application and mitigate the risk of an HTTP Host Header attack occurring. 29 Available from 9. You should be able to use relative links. Security headers play a crucial role in Jun 18, 2023 · Introduction: Host Header Injection is a critical web vulnerability that poses significant risks to the security of web applications. All of this can be time-consuming or stressful for some! header. 0), the name of the JVM vendor and the version of the JVM. Mar 12, 2025 · Host Header Injection is a vulnerability where an application improperly trusts and processes user-supplied host headers. The issue is, using Burp Suite they are capturing the request and modifying the Host header as below. Jul 29, 2025 · Host header injections have been around for a while now, and sometimes the developer just does not know how to get rid of them! Configuring virtual hosts, adding host verification codes to redirection pages, etc. M10 Fixed in Apache Tomcat 9. In the Inbound rules section, select Request Sep 29, 2020 · I'm trying to find a way to stop a host header attack from happening on my ALB. If an attacker can manipulate this header and the server processes or uses it without validation, the attacker may exploit it for various attacks, such as web cache poisoning, server-side request forgery (SSRF), password reset poisoning, or Aug 3, 2022 · I was reading in this article about Host header attacks https://crashtest-security. The value “1; mode=block” activates the XSS Filter built into most modern web browsers. Thank You WordPress devs!. M18 Fixed in Apache Tomcat 9. Features Oct 9, 2024 · Yes, it enables you to choose the From”, Name”, and Return-Path” headers for all WP notification emails. Select your web site. Discover best security practices to prevent these threats and secure your web applications. The reference in term of hosts headers attack is Practical Host header attacks (2013) and is still valid. 5 Important Oct 9, 2024 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. Follow this procedure to prevent a host header injection attack on Decision Center and Rule Execution Server. By default, this is the Default Web Site. I have reviewed our implementation of HSTS and believe it is correct, including a security-constraint in web. Looking at 'reflected' ASP. 29. Aug 17, 2024 · Understanding CVE-2024-34750: An In-Depth Look On July 3, 2024, a critical vulnerability identified as CVE-2024-34750 was published. Saving the Configuration File: After adding the line, save the file and close the editor. My load balancer takes care of redirecting port 80 to 443 and that is where the attack is possible. To do this with a local traffic policy instead refer to K42113232: Use the LTM to resolve Host Header Injection vulnerability To block requests with unwanted User-Agents refer to K31914583: Blocking HTTP requests with Apr 12, 2023 · The WAS External Sensor has detected a External Service Interaction via HTTP Header Injection after a DNS lookup request of type A for domain Validate user inputs in all headers including Host header and X-Forwarded-Host header. The attacker controls a resource on the same origin as the Oct 4, 2021 · This was necessary because I noticed that if I made a raw request like this (two Host headers): GET / HTTP/1. Mar 26, 2024 · How to remediate HTTP response header information disclosure on Nginx, IIS, and Apache - including "Server" and "X-Powered-By" headers. I wants to have Apache configured to protect against host header poisoning or injection attacks. Today we will learn about Host header injection. Reproducing steps: Expected behaviour: White-list all the redirect URLs. TLS information may not always be available. For example, it can be used to corrupt the web cache or password reset emails. com the if-checks would pass (because of the first Host header), but the second Host header would be passed to my app. Oct 9, 2024 · Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. 1 Host: mydomain. M22 Fixed in Apache Tomcat 9. Attackers would quite certainly use the absolute-uri trick to inject the bad header and be sure to reach the right virtualhost. xml). About Host Header Injection Fix Enables custom headers for WP email notifications Also “set it and forget it” security fix for WP < 5. Dec 17, 2024 · Then I switched to looking for a solution to this situation at the web server level - Apache. X-Forwarded Host Header Bypass In the event that Host header injection is mitigated by checking for invalid input injected via the Host header, you can supply the value to the X-Forwarded-Host header. By default, a page served by Tomcat will show like this. Standalone tomcat is usually not vulnerable. To enable JasperReports Host Header Injection is a web security vulnerability that occurs when an application improperly trusts the value of the "Host" header in an HTTP request. A number of vulnerabilities were found during JRA-16024 which expose JIRA to header injection attacks: Note that different application server configurations may expose or hide the presence of a header injection vulnerability. Nov 14, 2024 · Topic You should consider using this procedure under the following condition: You want to use an iRule to block HTTP requests with unwanted hosts in the HTTP Host header. The application is Java Se Sep 29, 2023 · That GET reaches the Tomcat server AND the application (where I could hypothetically add code to validate the host). 2 Protocol enable for IBM WebSphere with SSL Handshake Debug Adding and removing headers during Application_BeginRequest always leads to headaches with your server complaining about not being able to do things after headers are set. Dec 6, 2024 · An article about HTTP Host header attacks. Features Nov 29, 2017 · How is an invalid host header getting set on the incoming request? This header is set by the browser to confirm the host name and port combination it is using to communicate with the server (which often the server is not even aware of) - I see two scenarios that could lead to a spoofed header: - A hacked web browser. htaccess file, the main configuration file, or virtual host configurations, ensure you regularly update your headers to make your server more secured. StrictHttpFirewall is the most suitable, so I'd propose adding a method StrictHttpFirewall#setAllowedHostnames(Predicate), which would ensure the hostname in HttpServletRequest is a known good value. While essential for shared hosting environments Oct 10, 2025 · Nested Components First implemented in Tomcat 9 and back-ported to 8. 5, Tomcat now supports Server Name Indication (SNI). 9. this allows you to fuzz HTTP headers efficiently making it ideal for testing header injection vulnerabilities like Host or X-Forwarded-Host etc. 4) Disable/Remove Server: Apache header info version (Apache2. You should always ask yourself Jul 6, 2018 · Host Header Injection: A host header is used when several web applications are deployed on the same IP address. Avoid pulling Apr 6, 2024 · Protecting your web applications from the Host header vulnerability injection is crucial in maintaining the security and integrity of your web infrastructure. In Apache/Nginx, as a reverse proxy to your tomcat server, create a dummy virtual host that catches all requests with unrecognized Host headers. Whether using the . The problem is that My router has a dynamic IP Address it keeps of Changing every time. This was fixed in revision 1521854. To make this attack possible, you need to use a proxy that differentiates between the host header and the target IP. NET code, I found that: There is only one way to add custom HTTP headers to an HTTP response, namely using the HttpResponse. May 7, 2017 · Learn how to install fix packs on WebSphere Application Server using the command line with step-by-step instructions and commands. Features Mar 31, 2014 · The "HOST" header is part of the http protocol, vulnerable applications are vulnerable because they insert the value of this header into the application code without proper validation, this means not only applications hosted on Apache/Nginx can be vulnerable. Jan 30, 2023 · By using mod_headers to validate the host header, you can prevent host header injection attacks, which can redirect your users to a malicious website. 5, this plugin continues to fix the host-header injection security issue. Apache Tomcat/9. This header specifies which website or web application the client intends to access. Creating a whitelist of trusted domains during the initial setup of the application and mapping domains received in Host header of each and every request with it. To block HTTP host header injection using URL Rewrite: On each MyID web server, open the Internet Information Service (IIS) Manager. Apr 27, 2017 · Rather than editing the webpack config file, the easier way to disable the host check is by adding a . Note: Vulnerabilities that are not Tomcat vulnerabilities but have either been incorrectly reported against Tomcat or where Tomcat provides a workaround are listed at the end of this page. Sep 6, 2019 · Validating Host header to ensure that the request is originating from that target host or not. com: Oct 10, 2025 · Clients normally use host names to identify the server they wish to connect to. xml a Connector redirecting port 80 to port 443. Tomcat 5. A malicious X-Forwarded-Host header may be injected in, for example, the following cases: The reverse proxy provides a very lax CORS policy which allows an attacker to set the header in a cross-origin Ajax request. dap8hk zjvp vqyx luemt thu k1d8 pxld ykh csthg lsswbj