Junos OS: MX Series: If a specific traffic rate goes above the DDoS threshold it will lead to an FPC crash

Summary

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). If specific traffic is received on MX Series and its rate exceeds the respective DDoS protection limit the ingress PFE will crash and restart. Continued receipt of this traffic will create a sustained DoS condition. This issue affects Juniper Networks Junos OS on MX Series: All versions prior to 19.1R3-S10; 19.2 versions prior to 19.2R3-S7; 19.3 versions prior to 19.3R3-S8; 19.4 versions prior to 19.4R3-S11; 20.2 versions prior to 20.2R3-S5; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R2.

Timeline

1. Apr 17, 2023, 12:00 AM UTCCVE published
2. Feb 5, 2025, 9:42 PM UTCCISA SSVC assessment

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

3. Feb 5, 2025, 9:42 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 19.1R3-S10; From 19.2 · fixed in 19.2R3-S7; From 19.3 · fixed in 19.3R3-S8; From 19.4 · fixed in 19.4R3-S11; From 20.2 · fixed in 20.2R3-S5; From 20.4 · fixed in 20.4R3-S6; From 21.1 · fixed in 21.1R3-S5; From 21.2 · fixed in 21.2R3-S4; From 21.3 · fixed in 21.3R3; From 21.4 · fixed in 21.4R3; From 22.1 · fixed in 22.1R2

References 1