CVE-2020-15111 – CRLF vulnerability in Fiber

https://notcve.org/view.php?id=CVE-2020-15111

In Fiber before version 1.12.6, the filename that is given in c.Attachment() (https://docs.gofiber.io/ctx#attachment) is not escaped, and therefore vulnerable for a CRLF injection attack. I.e. an attacker could upload a custom filename and then give the link to the victim. With this filename, the attacker can change the name of the downloaded file, redirect to another site, change the authorization header, etc. A possible workaround is to serialize the input before passing it to ctx.Attachment(). En Fiber versiones anteriores a 1.12.6, el nombre de archivo que se proporciona en la función c.Attachment() (https://docs.gofiber.io/ctx#attachment) no es escapado y, por lo tanto, es vulnerable a un ataque de inyección CRLF. • https://github.com/gofiber/fiber/pull/579/commits/f698b5d5066cfe594102ae252cd58a1fe57cf56f https://github.com/gofiber/fiber/security/advisories/GHSA-9cx9-x2gp-9qvh • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') •