Crack is a really simple JSON and XML parsing Ruby gem, ripped from Merb and Rails.
An XML parameter parsing vulnerability has been discovered in Crack.
A remote attacker could execute arbitrary code with the privileges of the process, cause a Denial of Service condition, or bypass security restrictions.
There is no known workaround at this time.
All Crack users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-ruby/crack-0.3.2"