Improper handling of filenames in Content-Disposition HTTP header in github.com/gin-gonic/gin

Vulnerability Description

The filename parameter of the Context.FileAttachment function is not properly sanitized. A maliciously crafted filename can cause the Content-Disposition header to be sent with an unexpected filename value or otherwise modify the Content-Disposition header. For example, a filename of "setup.bat";x=.txt" will be sent as a file named "setup.bat". If the FileAttachment function is called with names provided by an untrusted source, this may permit an attacker to cause a file to be served with a name different than provided. Maliciously crafted attachment file name can modify the Content-Disposition header.

References

• https://github.com/gin-gonic/gin/issues/3555
• https://github.com/gin-gonic/gin/pull/3556
• https://github.com/gin-gonic/gin/releases/tag/v1.9.1
• https://pkg.go.dev/vuln/GO-2023-1737