Ubuntu Security Notice 4377-2 - USN-4377-1 updated ca-certificates. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. The ca-certificates package contained an expired CA certificate that caused connectivity issues. This update removes the "AddTrust External Root" CA. In addition, on Ubuntu 12.04 ESM and Ubuntu 14.04 ESM, this update refreshes the included certificates to those contained in the 20190110 package. Various other issues were also addressed.