Denial of Service Vulnerability in Juniper Networks Junos OS and Junos OS Evolved
CVE-2025-21602

6.5MEDIUM

Key Information:

Vendor

Juniper Networks
Status
Junos OS and Junos OS Evolved
Vendor
CVE Published:
9 January 2025

What is CVE-2025-21602?

An Improper Handling of Exceptional Conditions vulnerability exists within the routing protocol daemon (rpd) of Juniper Networks’ Junos OS and Junos OS Evolved. By sending a specially crafted BGP update packet, an unauthenticated attacker can trigger a crash and subsequent restart of the rpd. This vulnerability is applicable to both iBGP and eBGP communications over IPv4 and IPv6. Continuous processing of this specific packet can lead to a sustained Denial of Service condition.

References

https://supportportal.juniper.net/JSA92872

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

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CVE-2025-21602 : Denial of Service Vulnerability in Juniper Networks Junos OS and Junos OS Evolved