Junos OS and Junos OS Evolved: In an MPLS scenario upon receipt of a specific IPv6 packet an FPC will crash

Summary

An Improper Input Validation vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker to cause a PFE crash and thereby a Denial of Service (DoS). An FPC will crash and reboot after receiving a specific transit IPv6 packet over MPLS. Continued receipt of this packet will create a sustained Denial of Service (DoS) condition. This issue does not affect systems configured for IPv4 only. This issue affects: Juniper Networks Junos OS All versions prior to 12.3R12-S21; 15.1 versions prior to 15.1R7-S10; 17.3 versions prior to 17.3R3-S12; 18.3 versions prior to 18.3R3-S6; 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S7, 19.3R3-S4; 19.4 versions prior to 19.4R3-S5; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2-S2, 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S3-EVO; 21.2 versions prior to 21.2R3-EVO; 21.3 versions prior to 21.3R2-S1-EVO, 21.3R3-EVO; 21.4 versions prior to 21.4R2-EVO.

Timeline

1. Jul 20, 2022, 2:15 PM UTCCVE published
2. Sep 17, 2024, 2:36 AM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  fixed in 12.3R12-S21; From 15.1 · fixed in 15.1R7-S10; From 17.3 · fixed in 17.3R3-S12; From 18.3 · fixed in 18.3R3-S6; From 19.4 · fixed in 19.4R3-S5; From 20.1 · fixed in 20.1R3; From 20.2 · fixed in 20.2R3-S2; From 20.3 · fixed in 20.3R3; From 21.1 · fixed in 21.1R2

• Juniper Networks Junos OS Evolved

  fixed in 20.4R3-S3-EVO; From 21.2 · fixed in 21.2R3-EVO; From 21.4 · fixed in 21.4R2-EVO

References 1