Vulnerability Report: GO-2023-1737

• CVE-2023-29401, GHSA-2c4m-59x9-fr2g
• Affects: github.com/gin-gonic/gin
• Published: May 11, 2023
• Modified: Jun 12, 2023

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.