An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a specific BGP update packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS).

Continuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

This issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this vulnerability.

This issue affects Junos OS: 

• from 21.2 before 21.2R3-S9,
• from 21.4 before 21.4R3-S9, 
• from 22.2 before 22.2R3-S5, 
• from 22.3 before 22.3R3-S4,
• from 22.4 before 22.4R3-S5, 
• from 23.2 before 23.2R2-S3, 
• from 23.4 before 23.4R2-S3, 
• from 24.2 before 24.2R1-S2, 24.2R2; 

This issue does not affect versions prior to 21.1R1.

Junos OS Evolved: 

• from 21.2 before 21.2R3-S9-EVO,
• from 21.4 before 21.4R3-S9-EVO, 
• from 22.2 before 22.2R3-S5-EVO, 
• from 22.3 before 22.3R3-S4-EVO,
• from 22.4 before 22.4R3-S5-EVO, 
• from 23.2 before 23.2R2-S3-EVO, 
• from 23.4 before 23.4R2-S3-EVO, 
• from 24.2 before 24.2R1-S2-EVO, 24.2R2-EVO.

This issue does not affect versions prior to 21.1R1-EVO

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

Junos OS Evolved: 21.2R3-S9-EVO, 21.4R3-S9-EVO, 22.2R3-S5-EVO, 22.3R3-S4-EVO, 22.4R3-S5-EVO, 23.2R2-S3-EVO, 23.4R2-S3-EVO, 24.2R1-S2-EVO, 24.2R2-EVO, 24.4R1-EVO, and all subsequent releases.

Junos OS: 21.2R3-S9, 21.4R3-S9, 22.2R3-S5, 22.3R3-S4, 22.4R3-S5, 23.2R2-S3, 23.4R2-S3, 24.2R1-S2, 24.2R2, 24.4R1, and all subsequent releases.

This issue is being tracked as 1828380 which is visible on the Customer Support website.

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

There are no known workarounds for this issue.

2025-01-08: Initial Publication
2025-01-09: 21.2R3-S9 and 21.2R3-S9-EVO added in solution. 

• 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

Juniper SIRT would like to acknowledge and thank Craig Dods from Meta’s Infrastructure Security Engineering team for responsibly reporting this vulnerability.