Improper Input Validation in Junos OS Affects Juniper Networks Devices
CVE-2025-30649

8.7HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Vendor
CVE Published:
9 April 2025

Badges

👾 Exploit Exists

What is CVE-2025-30649?

An Improper Input Validation vulnerability in the syslog stream TCP transport of Juniper Networks' Junos OS affects MX240, MX480, and MX960 devices equipped with the MX-SPC3 Security Services Card. This vulnerability allows unauthenticated, network-based attackers to generate specially crafted packets, leading to Denial of Service (DoS) conditions by overwhelming the CPU of the MX-SPC3 SPUs. Continuous processing of these malicious packets can exacerbate the DoS situation. Indicators of compromise include a significant spike in SPC3 SPUs utilization, observable through system commands that showcase CPU overload and resource usage.

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Affected Version(s)

Junos OS MX240 0 < 22.2R3-S6

Junos OS MX240 22.4 < 22.4R3-S4

Junos OS MX240 23.2 < 23.2R2-S3

References

https://supportportal.juniper.net/JSA96459
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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