CVE-2023-36835

Summary

CVE-2023-36835 is a vulnerability affecting Juniper Networks Junos OS on QFX10000 Series, where an Improper Check for Unusual or Exceptional Conditions issue in the Packet Forwarding Engine (PFE) leads to a Denial of Service (DoS) condition. When a specific valid IP packet is routed over a VXLAN tunnel, it triggers a PFE wedge condition, causing traffic disruption. This issue persists until the system is rebooted. Affected versions include 20.3R1 and later, 20.4R3-S5 and earlier, 21.1R3-S5 and earlier, 21.2R3-S5 and earlier, 21.3R3-S4 and earlier, 21.4R3-S1 and earlier, 22.1R3 and earlier, 22.2R2 and earlier, 22.3R1-S2, 22.3R2 and earlier. Network-based attackers can exploit this vulnerability to cause service disruption.

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