6

CVE-2025-21597

An Improper Check for Unusual or Exceptional Conditions vulnerability in routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer to cause Denial of Service (DoS).

On all Junos OS and Junos OS Evolved platforms, when BGP rib-sharding and update-threading are configured, and a BGP peer flap is done with specific timing, rpd crashes and restarts. Continuous peer flapping at specific time intervals will result in a sustained Denial of Service (DoS) condition.

This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations.  This issue requires a remote attacker to have at least one established BGP session. The issue can occur with or without logical-systems enabled.

This issue affects:
Junos OS:



  *  All versions before 20.4R3-S8,
  *  21.2 versions before 21.2R3-S6,

  *  21.3 versions before 21.3R3-S5,
  *  21.4 versions before 21.4R3-S4,
  *  22.1 versions before 22.1R3-S3,
  *  22.2 versions before 22.2R3-S1,
  *  22.3 versions before 22.3R3,
  *  22.4 versions before 22.4R3.


Junos OS Evolved:



  *  All versions before 21.2R3-S6-EVO,
  *  21.3-EVO versions before 21.3R3-S5-EVO,
  *  21.4-EVO versions before 21.4R3-S4-EVO,
  *  22.1-EVO versions before 22.1R3-S3-EVO,
  *  22.2-EVO versions before :22.2R3-S1-EVO,
  *  22.3-EVO versions before 22.3R3-EVO,
  *  22.4-EVO versions before 22.4R3-EVO.

Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD
Diese Information steht angemeldeten Benutzern zur Verfügung.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerJuniper Networks
≫
Produkt Junos OS
Default Statusunaffected
Version < 20.4R3-S8
Version 0
Status affected
Version < 21.2R3-S6
Version 21.2
Status affected
Version < 21.3R3-S5
Version 21.3
Status affected
Version < 21.4R3-S4
Version 21.4
Status affected
Version < 22.1R3-S3
Version 22.1
Status affected
Version < 22.2R3-S1
Version 22.2
Status affected
Version < 22.3R3
Version 22.3
Status affected
Version < 22.4R3
Version 22.4
Status affected
HerstellerJuniper Networks
≫
Produkt Junos OS Evolved
Default Statusunaffected
Version < 21.2R3-S6-EVO
Version 0
Status affected
Version < 21.3R3-S5-EVO
Version 21.3-EVO
Status affected
Version < 21.4R3-S4-EVO
Version 21.4-EVO
Status affected
Version < 22.1R3-S3-EVO
Version 22.1-EVO
Status affected
Version < 22.2R3-S1-EVO
Version 22.2-EVO
Status affected
Version < 22.3R3-EVO
Version 22.3-EVO
Status affected
Version < 22.4R3-EVO
Version 22.4-EVO
Status affected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.04% 0.129
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
sirt@juniper.net 5.3 1.6 3.6
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
sirt@juniper.net 6 0 0
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:A/V:X/RE:X/U:X
CWE-754 Improper Check for Unusual or Exceptional Conditions

The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.