Juniper Junos OS: 2025-01 Security Bulletin: Junos OS and Junos OS Evolved: Receipt of specially crafted BGP update packet causes RPD crash (JSA92872) (CVE-2025-21602)

Juniper Junos OS: 2025-01 Security Bulletin: Junos OS and Junos OS Evolved: Receipt of specially crafted BGP update packet causes RPD crash (JSA92872) (CVE-2025-21602)

Severity

6

CVSS

(AV:A/AC:L/Au:N/C:N/I:N/A:C)

Published

01/08/2025

Created

01/10/2025

Added

01/09/2025

Modified

01/28/2025

Description

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 21.4 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 21.4 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

Solution(s)

• juniper-junos-os-upgrade-latest

References

• https://attackerkb.com/topics/cve-2025-21602
• CVE - 2025-21602
• JSA92872