Ubuntu Security Update USN-5651-1: strongSwan vulnerability

[LinuxBot]

Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and and CRL distribution points (CDP) in certificates. A remote attacker could possibly use this issue to initiate IKE_SAs and send crafted certificates that contain URIs pointing to servers under their control, which can lead to a denial-of-service attack.

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