dnn security updates

Ordinarily, you'd be at the right spot, but we've recently launched a brand new community website... For the community, by the community. These URL's could then be used to inject html/script which could allow hackers to perform cross-site scripting attacks. Under certain rare circumstances this key may not be updated during install/upgrade, and this information could allow a potential hacker the ability to access the portal as any user, including both the host and admin accounts. All DNN sites running any version from 8.0.0 to 9.1.1. DNN thanks the following for identifying this issue and/or working with 2. Alternatively, DNN sites are multi-tenant and can be used to serve multiple sites within the same instance. displayed. A logical error was introduced which meant that a user who had "edit" access, also was able to access module settings. These vulnerable APIs are limited to a single The return path for the protected resource uses a querystring to store the url. a user account permission escalation. Depending on permissions, authenticated users can upload A malicious user can create The core already implements HttpOnly cookies to stop XSS attacks potentially stealing authentication cookies. the malicious user must entice other non-suspecting users to click on such a Whilst not a DotNetNuke issue, we are electing to add an additional filter to protect users. Code has been added to stop this happening. When a site contains a custom 404 error page is used, an anonymous user can receive limited rights to the previously logged in user in certain cases. to spoofing, data theft, relay and other attacks. Mitigating factors. Only DotNetNuke sites that have multiple language pack installs and use the Language skin object suffer from this flaw. For the 3.0 release of DotNetNuke we added a file manager module. The code that provides for this upload does not filter sufficiently for valid values. after login. The user must have access to the file manager. other users and even upload malicious code to the server. Admins need to change setting to make the Biography public to everyone; by default it is visible to admins only. To fix this problem, you are recommended to update to the latest version of the DNN platform (7.4.0 at time of writing). Note: Whilst 4.9.5 has a fix for this issue, site admins are recommended to use the 5.1.2 version which contains additional defensive coding to harden the ClientAPI against potential future issues. Whilst the majority of profile properties encode output, some are not. A malicious user must know how to create this link and force unsuspecting users to click the link. Due to the recent security update, the Rad Editor Provider will need an update. As such the greatest danger exists for sites that use sql server express user instances, as no user credentials are required, and the instance name is predictable. Mitigating factors Two areas have been altered to fix issues where more information that was necessary was made available. A potential hacker could generate a custom URL which contained an invalid viewstate value, composed of an XSS attack. ability to redirect users to different pages per system rules. To fix this problem, you are recommended to update to the latest version of the DNN platform (7.2.2 at time of writing). Then they must submit crafted working with us to help protect users: One of the new features of Yesterday, DNN Software released DNN version 8.0.3, which is a security fix solely for this issue. A failure to sanitize the “returnurl” query string parameter can mean an open-redirect. A failure to sanitize the “returnurl” query string parameter can mean an open-redirect. The host user must have added the HTM or HTML file type to the default File Upload Extensions. Theoretically knowning the drive and folder of the website is useful information to a potential hacker so this has been removed. end points. 18 Jul 2019 — First technical report sent to DNN (security@dnnsoftware.com). content designed to exploit the vulnerability. The FileSystem API performs a verification check for "safe" file extensions. The files InstallWizard.aspx and InstallWizard.aspx.cs must exist under Website Root\Install folder. To keep customers safe, exact details of the vulnerability were not released but the IDs for the related NIST … bindings in the “web.config” file for this new assembly if you are not did not honor the permission specified for them and they could be accessed A malicious user can craft a specific URL and send it through various channels (tweets, emails, etc.) To fix this problem, you are recommended to update to the latest version of DotNetNuke (4.9.1 at time of writing). 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. Cons. Only one specific cookie was found to be This attack may lead to the disclosure of confidential data, denial of service, server side request forgery, port scanning from the perspective of the machine where the parser is located, and other system impacts. A failure to detect certain input as malicious could allow a hacker to use a cross-site scripting attack to execute html/javascript. If the validationkey value is not set to "F9D1A2D3E1D3E2F7B3D9F90FF3965ABDAC304902" then your portal does not suffer from this issue. Create a SQL database for your website. You can find those packages available here along with a read-me for more details. 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. specifically crafted requests to identify some parameters and then use these to Keep up with security bulletins about the DNN (formerly DotNetNuke) open source CMS and online community software platform. 3. a user has to be tricked into visiting a page on another site that executes the CSRF. One needs to know the exact way to obtain this information. Sites that have enabled verified registration typically do not see this issue as the spam accounts do not use real email addresses, and user profile fields for unverified users are not visible to normal users (admin/host can view the profile). A malicious user may utilize a process to include in a message a file that they might not have had the permission to view/upload, and with the methods that the DNN File system works they may be able to gain access to this file. For a CSRF to work against a different user it requires that the user is logged in - by default DotNetNuke does not use persistent cookies so this will not always be the case. A malicious user must know that a DNN site is hosted in an IIS server which is configured to direct to all incoming traffic to this site, and must know what the exact URL to target this sites is. DotNetNuke has a custom errorpage for handling displaying information to users. To fix this problem, you are recommended to update to the latest version of DotNetNuke (4.8.3 at time of writing). 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). DNN sites allow users to upload images to the sites for various purposes. must entice a limited subset of users into viewing the information. IIS website) to another instance, even on the same server. A bug was fixed in the existing Captcha control that allowed a single cracked captcha to be reused for multiple user registration. This support comes through an assembly craft a special HTTP request that allows them to perform a WEB API call to However, after being acquired by a private equity … Typically we do not provide details of security fixes, as those may only serve to help the potential hackers, but in this case as this fix is not expected to resolve 100% of automated registration issues, some detail is merited. Whilst this password is not visible, it can allow a potential hacker to access the password so the field has been marked to ensure that it will not be automatically filled. Make a back-up of your site, test the upgrade thoroughly before taking it into production. Whilst there is code in place to validate the user roles and permissions to determine which functions are shown to users, it is possible to craft requests that bypass these protections and execute admin functions. the one that comes with DNN 9.1.0 and add the necessary binding in the file. A The potential hacker must induce a user to click on a URL that contains both the location of a trusted site and the malicious content. To fix this problem you can upgrade to the latest versions malicious user may be able to perform XSS attacks. if the installwizard can be forced to load, the potential hacker must provide valid database connection details. It is and install a hot fix from here. distributions don't have any code utilizing the code that causes this An upgrade to DNN Platform version 9.5.0 or later is required, DNN Platform Versions 6.0.0 through 9.4.4. They can then capture some of the site specific data integrity values and use these via a CSRF attack to alter data via these public functions for other users. the Antiforgery checks may not be checked in Web API calls. DNN Platform version 7.0.0 through 9.5.0. 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. sites where single users administrate all the content are not affected. be protected by specifying various levels of permissions, such as restrict to If you have additional users the risk of user permission escalation or impersonation exists. To fix this problem, you are recommended to update to the latest versions of the Products - DNN Platform 9.0.2 or EVOQ 9.0.2 at the time of writing. and install a hot fix from here http://dnn.ly/SecurityFix201701 . Make a back-up. To fix this problem, you are recommended to update to the latest version of DNN (8.0.1 at time of writing). accessed anonymously as well. To remediate this issue upgrading to DNN Platform version 9.3.1 and later is recommended. DNN sites use WEB API calls to perform various server side actions from the browser’s user interface. Please use DNN_Platform_Source for official source code package. When logged in, if the user attempts to access another users profile, they are correctly redirected to a failure page. Background This only affects sites which display rich-text profile properties, and a few others which are available to privileged users only. must entice a limited subset of users into viewing the information. of the Products – DNN Platform Version 9.2.2 or EVOQ 9.2.2 at the time of Mitigating factors, To fix this problem, you are recommended to update to the latest version of DotNetNuke (5.6.6/6.1.2 at time of writing). [Messaging_Messages] where [FromUserID] in (select administratorid from portals), If you wish to review the set of messages first, a query similar to this will allow you to view the messages and determine which to delete, * FROM [dbo]. vulnerable. This page used to identify the operating system version to help users diagnose what permissions were missing. The blacklist function that is used to strip dangerous content that could lead to a cross-site scripting attack (XSS) did not contain a match for a particular string. To ensure pages work as desired, the page name and any associated parameters are copied to the form action tag on every page request. To fix this problem, you are recommended to update to the latest versions of the Products release 9.2.0. As this causes the application to unload, a large number of similar requests could cause a denial of service attack(http://en.wikipedia.org/wiki/Denial-of-service_attack) which could lead to the application running slow or not responding to requests at all. Once module settings were accessed, the user could grant themselves additional granular permissions. To fix this problem, you are recommended to update to the latest versions of the Products - DNN Platform 9.0.2 or EVOQ 9.0.2 at the time of writing. DNN Platform version 5.0.0 through 9.5.0. 9.1.1 at the time of writing. A malicious user can use a WEB API call to peek into server files outside the web site and compromise the server hosting the site. a specific script to communicate with the victim window in a way that can lead Fix(s) for issue This issue will only manifest under a reasonably rare set of permissions. Due to the nature of the elements included, and their usage with DNN Platform an upgrade to DNN Platform 9.5.0 or later is the only resolution for this issue.. For websites with user registration enabled, it is possible for a user to craft a registration that would inject malicious content to their profile that could expose information using an XSS style exploit. The DNN Framework contains code to support client to server operations that was added to the codebase before Microsoft Ajax was released. Newer installations are NOT vulnerable, however, an upgrade does NOT mitigate this risk. In addition, the user would have to have permission to upload files. As such these files need to be removed to protect against security profiling. DNN added support for 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. This could allow a malicious user to execute Javascript or another client-side script on the impacted user's computer. from Microsoft, there is a need to update this assembly in DNN sites. To remediate this issue an upgrade to DNN Platform Version (9.4.1 or later) is required. Users must upgrade DNN Platform to version 9.5.0 or later to be protected from this issue. These rich text editor controls typically leverage the DotNetNuke URLControl to provide a convenient method for selecting URLs, pages, and files for the portal. An issue with the freetextbox component has been reported, where users can upload filetypes that are not allowed by DotNetNuke, thereby avoiding the built-in filtering. Only a few Web APIs were This attack can be made as anonymous user also. Overview. . Once user clicks on such a link and arrives at such a DNN page, the user must further act willingly to the message displayed. The vulnerability could 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 permission to do so. As new features are implemented, older providers may remain, even if not used. A number of older JavaScript libraries have been updated, closing multiple individual security notices. DotNetNuke has a number of user management functions that are exposed both for users and administrators. The code has been updated to validate and remove such requests. files such as images, module & skin extensions, documents, etc. A malicious user must Some of these calls were be subject file path traversal. this folder or any other place on the server. This exception contained the path to help with diagnosing errors. However a weakness in the code means that a potential hacker can stop the redirect and gain access to the functions available to portal admins and host users. One needs to know the exact way to obtain this information. They can then use these to create new users, delete users, and edit existing users and roles for those users. The potential hacker must induce a user to click on a URL that contains both the location of a trusted site and the malicious content. This attack occurs when XML input containing a reference to an external entity is processed by a weakly configured XML parser. This issue is only possible on portals within the same website instance i.e. to be uploaded. Background The issue is only visible with very specific configurations within the DNN Platform, and the exploit would require specific knowledge to exploit, and the resulting impact is minimal. A malicious user must DNN Platform contains multiple JavaScript libraries that provide functionality. Since there is no way for an attacker to upload their own SQL scripts to this folder, the risk of arbitrary SQL script execution is not a factor. Whilst the search function filters for dangerous script , recently code was added to show the search terms and this failed to filter. View the full list of known and resolved issues and their bulletins. Accept the defaults in remaining dialogs. In addition code exists to maintain data integrity over postbacks. Potential hackers can use a specially crafted URL to access the install wizard and under certain circumstances create an additional host user. If a user could then be fooled into clicking on that link, a reflective XSS issue would occur Security Support for Retired Versions a page redirect to an IFRAME. A malicious user can Use our cloud hosting service for increased performance, security and reliability DotNetnuke allows administrators to utilise a standard login page or create their own custom login page. to exploit this vulnerability, a malicious user must know in advance about such Each bulletin includes details about the issue, the affected DNN versions, and suggested fixes or workarounds. This functionality was removed, but the code to support anonymous vendors was not removed. As each portal is unique, if a user moves between portals they are automatically expired and their permissions are regenerated - meaning that an Administrator on one portal is not automatically an Administrator on another. The DNN community would like to thank the following for their assistance with this issue. However, no information can be changed via this vulnerability. DNN Platform provides a number of methods to upload files, including zip files, allowing them to be extracted post upload. An example is The registration forms usually have only a handful of such properties defined. The maintainers of jQuery published version 3.5.0 with a security fixincluded regarding HTML manipulation. A malicious user can send a crafted request to login to a DNN site which uses Active Directory module for users’ authentication and cause high CPU usage in the server which can lead to a Denial of Service (DOS) attack. Note regarding the Rad HTML Editor. This will protect your site from being susceptible to automated security scanners or other probing tools typically used by malicious parties. Settings, which means executables cannot be uploaded. By default the list of "safe" file extensions ( defined in Host Settings ) is quite small, meaning that only files such as text files, jpgs and gif's can be uploaded, and not more dangerous files with dynamic extensions such as aspx/asp etc. The application uses a provider model to allow this functionality to be easily replaced with controls of the users choice, including default support for the popular FTB and FCK editor controls. Therefore, for safety reasons you need to upgrade this assembly to DotNetNuke thanks the following for working with us to help protect users: When a user is logged in when they access user functions a unique id is used to ensure that these functions are performed for the correct user. contain some old format SWF (Shockwave Flash) files included for demo purposes. The user must have access to edit the details of a user account to inject the required javascript. . Another way to fix this is to install .NET framework 4.5.2 or higher in the hosting server and configure IIS to run using this .NET version. A potential hacker must have authorized accounts on 2 or more portals , and one of these must have additional security roles. upgrade to the latest versions of the Products - DNN Platform 9.1.1 or EVOQ It is imperative that when removing a provider that backups are made and that all files are removed. DNN Platform includes the Telerik.Web.UI.dll as part of the default installation. When a module is deleted within DNN Platform it is first moved to the Recycle Bin, for a soft-delete process, allowing restoration. DNN contains a CMS Services Provided. It also supports the ability to supply replaceable tokens. delete the HtmlEditorProviders\Ftb3HtmlEditorProvider folder from your installation, and remove FreeTextBox.dll and DotNetNuke.Ftb3HtmlEditorProvider.dll from your bin folder. Security Alerts. 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 can upload an SVG file which can contain some malicious code to steal some users’ sensitive data (cookies, etc.). DotNetNuke (DNN) in the Enterprise in 2020. It is possible to view this information as an anonymous user.This information could be useful to hackers attempting to profile an application. A malicious user may create a link to the site's registration page in such a way, that clicking in a certain area on the page may let a user visit an external page. allow security feature bypass if an attacker convinces a user to click a The improvement program was never really used. Site administrators/Host users would have to be induced to click on a link to their website that contained the XSS code.

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