CVE Alert: CVE-2025-30660

Vulnerability Summary: CVE-2025-30660

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. When this issue occurs the following logs can be observed: MQSS(0): LI-3: Received a parcel with more than 512B accompanying data CHASSISD_FPC_ASIC_ERROR: ASIC Error detected <...> This issue affects Junos OS: * all versions before 21.2R3-S9, * 21.4 versions before 21.4R3-S8, * 22.2 versions before 22.2R3-S4, * 22.4 versions before 22.4R3-S5, * 23.2 versions before 23.2R2-S2, * 23.4 versions before 23.4R2.

Affected Endpoints:

No affected endpoints listed.

Published Date:

4/9/2025, 8:15:30 PM

🔥 CVSS Score:

Exploit Status:

Not Exploited

References:

• https://supportportal.juniper.net/JSA96471

Recommended Action:

No proposed action available. Please refer to vendor documentation for updates.

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