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.

For a device to be affected both of the following two lines of configuration need to be present on at least two revenue interfaces:

[ interfaces <interface> family mpls ]

[ interfaces <interface> family inet6 ]

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2022-22214.
 

The following software releases have been updated to resolve this specific issue:
 

Junos OS: 12.3R12-S21, 15.1R7-S10, 17.3R3-S12, 18.3R3-S6, 18.4R2-S9, 18.4R3-S9, 19.1R2-S3, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R2-S7, 19.3R3-S4, 19.4R3-S5, 20.1R3, 20.2R3-S2, 20.3R3, 20.4R2-S2, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases.
 

Junos OS Evolved: 20.4R3-S3-EVO, 21.2R3-EVO, 21.3R2-S1-EVO, 21.3R3-EVO, 21.4R2-EVO, 22.1R1-EVO, and all subsequent releases.
 

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
 

This issue is being tracked as 1578481 and 1642721.
 

2022-07-13: Initial publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team