CVE-2025-21597

April 9, 2025, 8:15 p.m.

5.3
Medium

Description

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.

Product(s) Impacted

Product Versions
junos_os
  • 21.2
junos_os
  • 21.4
junos_os
  • 22.2
junos_os
  • 22.4
junos_os
  • <20.4R3-S8
junos_os
  • 21.3
junos_os
  • 22.1
junos_os
  • 22.3
junos_os_evolved
  • <21.2R3-S6-EVO
junos_os_evolved
  • 21.3-EVO
junos_os_evolved
  • 21.4-EVO
junos_os_evolved
  • 22.1-EVO
junos_os_evolved
  • 22.2-EVO
junos_os_evolved
  • 22.3-EVO
junos_os_evolved
  • 22.4-EVO

Weaknesses

Common security weaknesses mapped to this vulnerability.

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.

References

https://kb.juniper.net/JSA96451

Tags

CWE-754
sirt@juniper.net
2025-04-09
CVE-2025-21597

CVSS Score

5.3 / 10

CVSS Data - 3.1

  • Attack Vector: ADJACENT_NETWORK
  • Attack Complexity: HIGH
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: HIGH

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

    View Vector String

Timeline

Published: April 9, 2025, 8:15 p.m.
Last Modified: April 9, 2025, 8:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

sirt@juniper.net

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.