Junos OS: QFX10000 Series: All traffic will be dropped after a specific valid IP packet has been received which needs to be routed over a VXLAN tunnel

Summary

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX10000 Series allows a network based attacker to cause a Denial of Service (DoS). If a specific valid IP packet is received and that packet needs to be routed over a VXLAN tunnel, this will result in a PFE wedge condition due to which traffic gets impacted. As this is not a crash and restart scenario, this condition will persist until the system is rebooted to recover. This issue affects Juniper Networks Junos OS on QFX10000: 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S5; 21.3 versions prior to 21.3R3-S4; 21.4 versions prior to 21.4R3-S1; 22.1 versions prior to 22.1R3; 22.2 versions prior to 22.2R2; 22.3 versions prior to 22.3R1-S2, 22.3R2.

Timeline

1. Jul 14, 2023, 5:11 PM UTCCVE published
2. Nov 7, 2024, 2:18 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Nov 7, 2024, 2:24 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  From 20.3; From 20.4 · fixed in 20.4R3-S5; From 21.1 · fixed in 21.1R3-S5; From 21.2 · fixed in 21.2R3-S5; From 21.3 · fixed in 21.3R3-S4; From 21.4 · fixed in 21.4R3-S1; From 22.1 · fixed in 22.1R3; From 22.2 · fixed in 22.2R2

References 1