GHSA-6q65-j4jw-9cg8 DotVVM allows path traversal when deployed in Debug mode

• NuGet DotVVM: >= 4.3.0-preview01-final, < 4.3.8 → fixed in 4.3.8 • NuGet DotVVM: >= 5.0.0-preview01-final, < 5.0.0-preview03-final → fixed in 5.0.0-preview03-final • NuGet DotVVM: < 4.2.10 → fixed in 4.2.10

Description There is a path traversal vulnerability in any DotVVM application started in Debug mode, if at least one resource with the `FileResourceLocation` has been added. The vulnerability allows an attacker to read arbitrary files from the filesystem accessible by the web application (i.e. appsettings.json or other files containing secrets). Patches The bug is patched in versions 4.2.10, 4.3.8 and 5.0.0-preview03-final (and newer). Apart from updating DotVVM, it is also recommend invalidating any secrets which could have been leaked by an application deployed in Debug mode (such as database passwords). Workarounds If you cannot update to a patched version, avoid running a publicly accessible DotVVM application in Debug mode (Development environment in Asp.Net Core). It is recommend adding the following statement to the DotvvmStartup class: ``` config.Debug = false; // TODO: workaround for GHSA-6q65-j4jw-9cg8, remove after updating DotVVM ```