Improper input validation in Juniper Junos OS



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-30649
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Juniper Junos OS
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU107617

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-30649

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation error in the syslog stream TCP transport . A remote non-authenticated attacker can send specific spoofed packets to cause a CPU Denial of Service (DoS) to the MX-SPC3 SPUs.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: All versions

CPE2.3 External links

https://supportportal.juniper.net/s/article/2025-04-Security-Bulletin-Junos-OS-MX240-MX480-MX960-with-SPC3-An-attacker-sending-specific-packets-will-cause-a-CPU-utilization-DoS-CVE-2025-30649


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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