CVE-2025-21600 Information

Description

An Out-of-Bounds Read vulnerability in

the routing protocol daemon (rpd) of

Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

This issue only affects systems configured in either of two ways:

      systems with BGP traceoptions enabled

      systems with BGP family traffic-engineering (BGP-LS)
      configured

and can be exploited from a directly connected and configured BGP peer. 

This issue affects iBGP and eBGP

with

any address family

configured and both IPv4 and IPv6 are affected by this vulnerability.

This issue affects:

Junos OS: 

All versions 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; 

Junos OS Evolved: 

All versions 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-S2-EVO 
from 24.2 before 24.2R1-S2-EVO 24.2R2-EVO.

This is a similar but different vulnerability than the issue reported as CVE-2024-39516.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA92870

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5