{"containers":{"cna":{"affected":[{"product":"Junos OS Evolved","vendor":"Juniper Networks","versions":[{"lessThan":"20.4R1-EVO","status":"affected","version":"unspecified","versionType":"custom"}]}],"datePublic":"2021-04-14T00:00:00.000Z","descriptions":[{"lang":"en","value":"In Juniper Networks Junos OS Evolved, receipt of a stream of specific genuine Layer 2 frames may cause the Advanced Forwarding Toolkit (AFT) manager process (Evo-aftmand), responsible for handling Route, Class-of-Service (CoS), Firewall operations within the packet forwarding engine (PFE) to crash and restart, leading to a Denial of Service (DoS) condition. By continuously sending this specific stream of genuine Layer 2 frames, an attacker can repeatedly crash the PFE, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R1-EVO. 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