CVE-2023-44192

Vulnerability Summary

An Improper Input Validation vulnerability in the Packet Forwarding Engine of Juniper Networks Junos OS allows an unauthenticated, network-based malicious user to cause memory leak, leading to Denial of Service (DoS). On all Junos OS QFX5000 Series platforms, when pseudo-VTEP (Virtual Tunnel End Point) is configured under EVPN-VXLAN scenario, and specific DHCP packets are transmitted, DMA memory leak is observed. Continuous receipt of these specific DHCP packets will cause memory leak to reach 99% and then cause the protocols to stop working and traffic is impacted, leading to Denial of Service (DoS) condition. A manual reboot of the system recovers from the memory leak. To confirm the memory leak, monitor for "sheaf:possible leak" and "vtep not found" messages in the logs. This issue affects: Juniper Networks Junos OS QFX5000 Series: * All versions before 20.4R3-S6; * 21.1 versions before 21.1R3-S5; * 21.2 versions before 21.2R3-S5; * 21.3 versions before 21.3R3-S4; * 21.4 versions before 21.4R3-S3; * 22.1 versions before 22.1R3-S2; * 22.2 versions before 22.2R2-S2, 22.2R3; * 22.3 versions before 22.3R2-S1, 22.3R3; * 22.4 versions before 22.4R1-S2, 22.4R2.

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