RubySec

Providing security resources for the Ruby community

CVE-2018-3760 (sprockets): Path Traversal in Sprockets

ADVISORIES

GEM

sprockets

PATCHED VERSIONS

  • >= 2.12.5, < 3.0.0
  • >= 3.7.2, < 4.0.0
  • >= 4.0.0.beta8

DESCRIPTION

Specially crafted requests can be used to access files that exist on the filesystem that is outside an application’s root directory, when the Sprockets server is used in production.

All users running an affected release should either upgrade or use one of the work arounds immediately.

Workaround: In Rails applications, work around this issue, set config.assets.compile = false and config.public_file_server.enabled = true in an initializer and precompile the assets.

This work around will not be possible in all hosting environments and upgrading is advised.