This package contains the set of CA certificates chosen by the Mozilla Foundation for use with the Internet Public Key Infrastructure . It was found that a subordinate Certificate Authority mis-issued an intermediate certificate, which could be used to conduct man-in-the-middle attacks. This update renders that particular intermediate certificate as untrusted. All users should upgrade to this updated package. After installing the update, all applications using the ca-certificates package must be restarted for the changes to take effect.