Laravel RCE vulnerability in "cookie" session driver
Applications using the "cookie" session driver that were also exposing an encryption oracle via their application were vulnerable to remote code execution. An encryption oracle is a mechanism where arbitrary user input is encrypted and the encrypted string is later displayed or exposed to the user. This combination of…
As published by the sources
Affected packages
- Affected
>=4.1.0,<6.18.31 || >=7.0.0,<7.22.4Fixed in6.18.317.22.4
Derived from the fixed versions above
What to do
Upgrade laravel/framework to the fixed version in your release line: 6.18.31, 7.22.4.
composer update laravel/framework --with-dependencies
To see which version you have installed, run composer show vendor/package. Running composer audit lists the known advisories that match your installed versions.
Quoted from the original advisory
Details
Applications using the "cookie" session driver that were also exposing an encryption oracle via their application were vulnerable to remote code execution. An encryption oracle is a mechanism where arbitrary user input is encrypted and the encrypted string is later displayed or exposed to the user. This combination of scenarios lets the user generate valid Laravel signed encryption strings for any plain-text string, thus allowing them to craft Laravel session payloads when an application is using the "cookie" driver.