SB2025041469 - Improper check for unusual or exceptional conditions in Juniper Junos OS

Security Bulletin ID SB2025041469

Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper check for unusual or exceptional conditions (CVE-ID: CVE-2025-30660)

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

The vulnerability exists due to improper check for unusual or exceptional conditions error in the Packet Forwarding Engine (pfe). A remote non-authenticated attacker can 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 dataCHASSISD_FPC_ASIC_ERROR: ASIC Error detected.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2025-04-Security-Bulletin-Junos-OS-MX-Series-Decapsulation-of-specific-GRE-packets-leads-to-PFE-reset-CVE-2025-30660