Improper Handling of Special Elements in Junos OS by Juniper Networks
CVE-2025-30656

8.7HIGH

Key Information:

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

Badges

👾 Exploit Exists

Summary

An improper handling vulnerability in the Packet Forwarding Engine (PFE) of Junos OS allows unauthenticated network-based attackers to create a Denial-of-Service (DoS) condition. Specifically, when the SIP ALG processes specially formatted SIP invites, it can trigger memory corruption issues, leading to a crash of the FPC processing those packets. The system may automatically recover upon restarting the FPC; however, subsequent SIP invites will result in repeated crashes, resulting in sustained denial-of-service conditions. Affected versions span across various series of products, emphasizing the need for prompt updates to ensure network stability.

Affected Version(s)

Junos OS MX Series 0 < 21.2R3-S9

Junos OS MX Series 21.4 < 21.4R3-S10

Junos OS MX Series 22.2 < 22.2R3-S6

References

https://supportportal.juniper.net/JSA96466
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

.