Juniper Networks Junos OS Vulnerability Leads to Denial of Service

CVE-2024-39540

What is CVE-2024-39540?

The vulnerability in Juniper Networks' Junos OS manifests within the Packet Forwarding Engine (pfe) on SRX Series and MX Series devices equipped with SPC3. An unauthenticated, network-based attacker can exploit this flaw by sending specific valid TCP traffic, leading to a crash and restart of the pfe. This results in a complete, albeit temporary, service outage. Affected versions include releases from Junos OS 21.2R3-S5 up to but not including 21.2R3-S6. Devices running earlier or later releases remain unaffected.

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