To install DotNetNuke the user must have write access to the root folder. Our recommendation is to always follow DNN’s upgrade path. A malicious user must This issue will only manifest under a reasonably rare set of permissions. versions of the Products - DNN Platform 8.0.2 or Evoq 8.4.1 at the time of It is not possible to update jQuery alone without an DNN version upgrade. When a DotNetNuke portal is installed the version number if displayed on the link to first access the portal. Web APIs to perform various CMS tasks from outside of the CMS. be protected by specifying various levels of permissions, such as restrict to This exception contained the path to help with diagnosing errors. The reporter has chosen not to share their name. To fix this problem, you are recommended to update to the latest version of DotNetNuke (3.3.6/4.3.6 at time of writing). manage files from within the CMS itself as opposed to using a service like FTP. BUG FIXES 18 Jul 2019 — First technical report sent to DNN (security@dnnsoftware.com). upgrade to the latest versions of the Products - DNN Platform 9.1.1 or EVOQ DNN allows several file Newly Also, DNN contains a tab's control that allows for content to be organised under clickable tabs. This vulnerability is available when running the web site under .NET Framework 4.5.1 and earlier. DNN Platform Versions 5.0.0 through 9.6.0, The DNN Community thanks the following for identifying the issue and/or working with us to help protect Users. For sql server databases, the user must supply the servername and database. The malicious user must be logged in a privileged user know which API call can be utilized for path traversal and must craft a special request for this purpose. This is a recommended install as it offers protection against a number of other non-DotNetNuke specific URL based issues. The Security Task Force publishes security bulletins in the DNN blog, in forum posts, and sometimes by email. Critical Security Update. DCNN sites support user authentication through active directory using a special module. DNN has provided several Fix(s) for issue 5.1.20821.0. and install a hot fix from here http://dnn.ly/SecurityFix201701 . A failure to sanitize the “returnurl” query string parameter can mean an open-redirect. The malicious user must be logged in a privileged user know which API call can be utilized for path traversal and must craft a special request for this purpose. The function uses direct filesystem methods to check for these files existence and not the DotNetNuke API so it can allow for the existence of a file with an unmapped extension to be made e.g. be uploaded within the Portals folder only; it cannot be uploaded outside of To fix this problem, you are recommended to update to the latest versions of the Product release 9.2.0, All DNN sites running any version from 7.2.0 to 9.1.1. DNN thanks the following for identifying this issue and/or working with us to help protect users: ASP.Net recommends and provides For versions older than 9.1.1, you can download A malicious user can Security Bulletins. Microsoft released an The malicious user must know the specifics of the SVG to initiate such attacks and must lure registered site users to visit the page displaying the uploaded SVF file. recommended to delete all SWF files (*.swf) from your site. As such this function has little added value, but it's removal complies with best practices. This support comes through an assembly This issue is more theoretical than practical as even if the path details are viewed, the site has insufficent permissions for a hacker to access. To remediate this issue and upgrade to DNN Platform Version (9.4.1 or later) is required. malicious user could take specific action(s) to allow malicious content to be DNN does To fix this problem, you are recommended to update to the latest versions of the DNN (9.2.0 at the time of writing). DNN thanks the following for identifying this issue and/or us to help protect users: DNN provides a way for users to register in a site. IIS website) to another instance, even on the same server. did not honor the permission specified for them and they could be accessed A malicious user may utilize a scripting process to exploit a file upload facility of a previously DNN distributed provider. update {databaseOwner}{objectQualifier}ModuleControls An additional filter to remove potential XSS issues was added to these profile properties. This cookie is rarely used. The feature allows scripts to post messages All DNN sites running any version from 8.0.0 to 9.1.1. As the information is important it will still show if the versions differ, but if they are in sync which is the normal case, the version is not revealed. There is also a patch available that can be installed also. DNN has code to ensure that these redirects are always to valid locations and not to untrusted external locations. know exactly which WEB API methods are subject to this vulnerability and must To remediate this issue an upgrade to DNN Platform Version (9.4.1 or later) is required. At this point in time, there is no known patch for prior versions. As such these files need to be removed to protect against security profiling. DNN installations To be affected, a site would have to grant edit permissions to one or more users for a module that uses the editor component such as the text/html module. under the same copy of the dotnetnuke code in IIS. be protected by specifying various levels of permissions, such as restrict to Anti-forgery token called RequestVerificationToken is used in DNN Web APIs to help prevent Cross-Site Request Forgery (CSRF) attacks. DNN installations During installation of new releases, or upgrade of any release prior to 3.0, DotNetNuke automatically generates a unique validationkey to secure the users forms authentication cookie and viewstate. To fix this problem, you are recommended to update to the latest version of DotNetNuke (3.3.5/4.3.5 at time of writing). Additionally, interactions are still bound by all other security rules, as if the module was placed on the page. Form Builder. N/A When performing an installation or upgrade DotNetNuke forces the application to unload and reload so that changes can be processed. important to note that this vulnerability is limited to image files only. The code for the user profile properties has a bug where an unautheticated user could access member-only properties under certain configurations. Use DNN’s Secure flag. A malicious user can create Profile properties contain support for validating data passes a regular expression match. Upgrading to DNN Platform version 9.6.0 or later is required to mitigate this issue. exploit this vulnerability. A malicious user may use information provided by some installations to decipher or calculate certain key cryptographic information, this could allow further unintended access to be gained. The DNN Framework contains code to support client to server operations that was added to the codebase before Microsoft Ajax was released. A number of these libraries have published their own security vulnerabilities such as XSS, DDoS and similar. When sending a message it is possible to upload/send a file. DNN sites allow a site administrator to specify a specific page which get displayed when a BAD REQUEST error occurs in a page/control. To fix this problem, you can The Journal module allows a user to post a link to an image they have previously uploaded. distributions don't have any code utilizing the code that causes this A failure to sanitize URL query string parameters can mean a cross-site scripting (XSS) issue occurs. The malicious user must know the specifics of the SVG to initiate such attacks and must lure registered site users to visit the page displaying the uploaded SVF file. malicious user may be able to perform XSS attacks. To fix this problem, you are recommended to update to the latest version of DotNetNuke (5.3.0 at time of writing), Click here to read more details on the DotNetNuke Security Policy. The fix and the vulnerability DNN Platform & Security Notices. The malicious user need to know which image upload call is subject to this vulnerability and must craft a very specific URL request to be able to exploit this issue. links. Here are some quick tips you can find out DNN version of your site. The user profile module supports templating so these properties are optional. This will protect your site from being susceptible to automated security scanners or other probing tools typically used by malicious parties. Mitchell Sellers. implements where applicable. Microservices. A few API calls were missing these validations. Overview. If you see suspected issues/security scan results please report them by sending an email to: Whilst the modules would then fail to install fully due to user file permissions, it was possible to access the failed installation and hence run code. A poor design pattern in the validation code meant that it was possible for potential hackers to access both the install and uninstall functions via a user who did not have host permissions. Jun 28th Critical Security Update & Vulnerability for DNN GO Modules There has been a vulnerability and security exploit discovered in the 3rd party DNN Module suite named "DNN GO". Most of the time parameters are used to determine which code to execute, but in a few cases, notably the error parameter, the content of the querystring is directly echoed to the screen. To fix this problem, you are recommended to update to the latest version of the DNN platform (7.2.2 at time of writing). affected. Mitigating factors. Some of these profile properties can be supplied during user registration, but all of them can be updated under the user’s profile area of DNN. Alternatively users can block access to log files by adding the following to their web.config's HttpHandler section. The past two years have afforded the DNN Platform some amazing technological improvements that continue to enhance the capabilities of the platform. Then they must submit crafted requests to target this vulnerability. This does not effect sites that have disabled registration. Under rare circumstances such as the sql server not being available it is possible to invoke the wizard and navigate to a screen that checks the connection. DNN thanks the following for working with us to help protect users: Page will redirect to http channel when enable SSL Client Redirect. A malicious user must know which API to utilize and send a specially crafted request to the site. Code has been added to stop this happening. Mitigating factors. To fix this problem you can upgrade to the latest versions If you are able to, users are encouraged to update to version 8.0.3 or Evoq 8.4.2 to mitigate the potential for malicious attackers to use this vulnerability against your site. The Security Task Force then issues a security bulletin via DNN security forum posts and, where judged necessary, email. A DNN site allows users to interact by posting their activities in an activity stream Journal. This only affects sites where users are granted "edit" permissions i.e. In cases where a site has a single user the issue obviously is non existant. It is possible to remotely force DotNetNuke to run through it's install/upgrade step. This means that a hacker could impersonate other users or perform an escalation attack by accessing a user such as the admin or host user. The excessive number of files may result in disk space issues and cause This issue only affects sites where module permissions are more restrictive than the page permissions on which they sit. DNN Platform contains multiple JavaScript libraries that provide functionality. are the same as discussed in the above link.. For further details, you can logged within the DNN system. To fix this problem, you can use either of these two options : Upgrade your version to either 3.3.3/4.3.3 or later - this is the recommended solution. We make every effort to ensure speedy analysis of reported issues and, where required, provide workarounds and updated application releases to fix them. a url like the following, http://www.dotnetnuke.com/linkclick.aspx?link=http://untrustedwebsite.com. A problem was identified where an Administrator could upload static files which could then be converted into dynamic scripts. This support comes through an assembly The situation whereby these vulnerabilities exist is often only to certain user types which mitigates some of the risk, or access to the exploitation vector. DNN provides file-type restrictions which limit the ability for this to vulnerability to allow file uploads. To fix this problem, you are recommended to update to the latest version of DotNetNuke (4.9.2/5.0.1 at time of writing). All DNN sites running any version from 8.0.0 to 9.1.1. and not possible to accomplish without users clicking on the phishing link. To fix this problem you can upgrade to the latest versions Manual Configuration DNN sets you up with a blank page when you are first starting out, and you have to manually configure all of the extensions you want on your site. The Skin Manager is primarily used to apply a new skin to a site; however, it can also be used by designers for development of new skins using the Parse capability. A malicious user can craft a specific URL and send it through various channels (tweets, emails, etc.) cookie to target this vulnerability. The HTML/Text module is one of the core modules that is installed by default and provides an easy way to add custom html to a page. By default only certain parts of the DNN's administrative interface are exposed, so typically the user must be an admin or host. It is not possible to update jQuery alone without an DNN version upgrade. There is a reasonable expectation that only those explicitly granted permissions can add/edit files. This module suffers from an authentication blindspot which could allow a malicious user to update content that they do not have permission to administer. The error handling page optionally reads back a querystring parameter that may contain additional error information. The issues have been identified, however, there is no appearance of public exploitation. DotNetNuke contains a number of layers of protection to ensure that one user cannot execute actions as another user. A malicious user can make use of this feature to initiate a DOS attack on such sites. Include any product updates. Whilst system messages are often innocuous and simply warn a user if their profile has been updated (e.g. During usage of the DNN Framework, in a number of cases a redirect must occur after an action (such as working across portals). This could cause the SQL commands in the database scripts included with the application to re-execute. An upgrade to DNN Platform version 9.5.0 or later is required, DNN Platform Versions 6.0.0 through 9.4.4. Skin files are based on asp.net user controls (ascx) but add additional functionality such as security validation. content of their selection, without being authenticated to the website. User may think that the message is coming from the site itself, as opposed to the malicious user. a user account permission escalation. Sites that do not grant these permissions to users, or do not use the freetexteditor implementation of the html editor provider are not vulnerable to this issue e.g. A malicious user with specific knowledge of the exploit may add or edit files within the file system, without explicitly being granted permission. by an administrator) or if they've been added to a security role, there are a number of system messages which can contain sensitive data, in particular password reminders contain data that users would not want stored in clear text. a page redirect to an IFRAME. Then they must submit crafted requests to target this vulnerability. In Database Engine Configuration, under Authentication Mode, choose Mixed Mode. www.mysite.com). They can then use these to create new users, delete users, and edit existing users and roles for those users. This only affects sites that use "none" for registration. DNN added support for DNN contains a CMS DNN Platform version 5.0.0 through 9.5.0. DNN thanks the following for working with us to help protect users: Background The bulletin provides details about the issue, the DNN versions impacted, and suggested fixes or workarounds. Once accessed these functions allowed for the uninstalling of modules, or installation of modules. DNN sites allow users to upload images to the sites for various purposes. allow security feature bypass if an attacker convinces a user to click a To fix this problem, you are recommended to update to the latest version of DotNetNuke (4.7 at time of writing). If during initial installation the website does not have the correct filesystem permissions to install an exception is thrown. To fix this problem, you are recommended to update to the latest version of DotNetNuke (4.8.3 at time of writing). Mitigating factors. A bug was fixed in the existing Captcha control that allowed a single cracked captcha to be reused for multiple user registration. This attack occurs when XML input containing a reference to an external entity is processed by a weakly configured XML parser. The files InstallWizard.aspx and InstallWizard.aspx.cs must exist under Website Root\Install folder. In a few locations on the DNN site, page will redirect based on the “returnurl” query string parameter. after login. MVC vulnerability fix (KB2990942) a while ago. An upgrade to DNN Platform version 9.5.0 or later is required, DNN Platform Versions 6.0.0 through 9.4.4. If the link does not exist in the database then it is assumed to be a phishing request and will not redirect. There is also a patch available that can be installed also. In addition they support regular expressions to allow sites to configure the allowable characters. identifying this issue and/or working with us to help protect users: A malicious user can decode As new features are implemented, older providers may remain, even if not used. Verifies if the user provides valid login credentials. Mitigating factors. Anonymous user can discover some or most of the profile properties from a DNN site due to a vulnerability present in DNN. Sites that have enabled private registration a site where all the content is maintained only by one administrator who has host and portal admin permissions would not be affected. A cross-site scripting issue is an issue whereby a malicious user can execute client scripting on a remote server without having the proper access or permissions to do so. There are two very specific security settings that we set immediately. The logic for both the UrlControl and the FileSystem API was missing some key security validation. DotNetNuke has a search function which redirects to a custom results page. A The code has been refactored to filter the input to ensure that cross-site scripting attacks cannot occur. Security DNN receives security updates on a regular schedule, and all information is stored on an encrypted database. If the database is using sql security then a valid username and password must also be supplied. DNN Platform Versions 5.0.0 through 9.6.0, The DNN Community thanks the following for identifying the issue and/or working with us to help protect Users. Sites can protect against this issue by removing the messaging component. Use our cloud hosting service for increased performance, security and reliability An example is UPDATE: Based on the answer below about tying it with a module and further research, here is what I have done: I created a module just for this service, and I added two special permissions for it: "APIGET" and "APIPOST." Check your web.config file. know how to create this HTTP request and send thousands of such requests. • The original reporter does not wish to claim credit. DNN.Events 07.00.06 will work for any DNN version 8.0.1 and up to the latest release of DNNPlatform. Acknowledgments Upon typing certain keywords to search for content in DNN, user may get an error page instead of actual search results. Whilst these files are necessary for installation of DNN, they were left behind after the process finishes. a potential hacker must have access to a html module editor instance, a user must be using a browser that incorrectly implements the previously discussed behaviour, user must have module or page editor permissions, user must have access to the lists function - by default only admin and host users can access this module, user must have access to a member directory module, member directory module must be available to all (including anonymous) users, the site must allow users to post to other users journals. Go to User Mapping, and check the DNN database and the db_owner role. To fix this problem, you are recommended to update to the latest version of DotNetNuke (4.8.3 at time of writing), Tomotoshi Sugishita ( DotNetNuke Japan User Group ) DNN sites are multi-tenant and can be used to serve multiple sites within the same instance. Users can mitigate this vulnerability on all versions of DNN by reviewing and removing unused providers from the /Providers/ folder or via the Extensions section through the DNN UI. to help but be assured: DNN is well-documented for various topics like marketing, development, administrators, and … The issue is only visible with very specific configurations within the DNN Platform, and the exploit would require specific knowledge to exploit. The DNN Security Analyzer is a module aimed at helping you to improve the security on your DNN website. During the process of rewriting the code to extend the Profile component, an authorization issue was introduced that could allow a user (including anonymous users) to access another users profile. Since DotNetNuke 3.0 there has been a Skin Management option in the Admin interface. If you unable to upgrade to the latest version, you can rename or delete the following file from your installation: /Install/InstallWizard.aspx . When a module is deleted within DNN Platform it is first moved to the Recycle Bin, for a soft-delete process, allowing restoration. A malicious user with a properly constructed URL, and an DNN installation with a specific configuration could allow an injected javascript code to execute. Some Web APIs can be All DNN sites running any version from 9.0.0 to 9.1.1. DNN Authentication. This could allow a malicious user to execute Javascript or another client-side script on the impacted user's computer. It is recommended that ALL users validate their allowed file types setting to ensure dynamic file types are excluded. Further information on phishing can be found here. In order to other windows. These APIs have the abilities to make very minor system settings updates, To fix this problem, you are recommended to update to the latest versions of the Product release 9.2.0, All DNN sites running any version from 7.2.0 to 9.1.1. To remediate this issue upgrading to DNN Platform version 9.4.1 or later is recommended. vulnerability. of the Products – DNN Platform Version 9.2.2 or EVOQ 9.2.2 at the time of Mitigating factors. To remediate this issue upgrading to DNN Platform version 9.3.1 and later is recommended. Third-Party Component Integration - Documentation. A malicious user may upload a file with a specific configuration and tell the DNN Platform to extract the file. Whether you're new to DNN or experienced community member, you'll eventually find yourself on new grounds. The DNN Community would like to thank Sajjad Pourali for reporting this issue. must entice a limited subset of users into viewing the information. SVG image files can contain CSS and more importantly, JavaScript, Some DNN sites allow users to upload certain files to their sites. Each bulletin includes details about the issue, the affected DNN versions, and suggested fixes or workarounds. These operations are meant to Modules that were discarded to the recycle bin were still able to respond to API calls to their endpoints, which could result in data uploads and other interactions that would go unnoticed since the module was not visually displayed. the malicious user must entice other non-suspecting users to click on such a The excessive number of files may result in disk space issues and cause specially crafted link or to visit a webpage that contains specially crafted Newer installations are NOT vulnerable, however, an upgrade does NOT mitigate this risk. This only affects sites which display richtext profile properites. For the 3.3.3/4.3.3 releases of DotNetNuke, the membership/roles/provider components were significantly overhauled to allow better granularity of control, and to allow us to make a number of enhancements. Acknowledgments DNN thanks the following for working with us to help protect users: The DNN Framework contains code to allow internal messaging of users. This process could overwrite files that the user was not granted permissions to, and would be done without the notice of the administrator. In 6.0 DotNetNuke introduced folder providers as an abstraction to support alternative file stores, replacing the existing filesystem code. One needs to know the exact way to obtain this information. There is a reasonable expectation that only those explicitly granted permissions can add/edit files. upgrade to the latest versions of the Products - DNN Platform 9.1.1 or EVOQ The exploit allows user to copy an existing image to anywhere on the server, provided the application is running with higher privilege and has access to files outside of the root of the DNN site. The member directory fails to apply these checks to a number of fields. 2. set    ControlType = 1 However, after being acquired by a private equity … Follow this blog for more information: http://www.dnnsoftware.com/community-blog/cid/155416/902-release-and-security-patch. All DNN sites running any version from 7.0.0 to 9.1.1.

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