Dual_EC weaknesses and Juniper error exploited, researchers say. Security researchers suspect the United States' National Security Agency may have had a hand in the planting of unauthorised backdoors in Juniper's enterprise firewalls. The network equipment vendor last week issued an urgent security alert for its NetScreen enterprise firewalls, after discovering "unauthorised code" in the device operating system that allows them to be fully compromised. Juniper had discovered the code during an internal review. The backdoors - which had been in existence since 2012 - meant attackers could gain administrative access and decrypt VPN connections unnoticed. Researchers have now said the...