unbound: Unbound Cache poisoning

A cache poisoning flaw was found in Unbound. Resolvers supporting EDNS Client Subnet ECS must segregate outgoing queries to accommodate different outgoing ECS information. This issue reopens resolvers to a birthday paradox attack, known as the Rebirthday Attack, which attempts to match the DNS...

USN-7666-1 unbound vulnerabilities

Xiang Li discovered that Unbound incorrectly handled EDNS Client Subnet ECS in certain configurations. A remote attacker could possibly use this issue to perform a cache poisoning attack called Rebirthday Attack...