CVE-2025-30657: Junos OS: Processing of a specific BGP update causes the SRRD process to crash
An Improper Encoding or Escaping of Output vulnerability in the Sampling Route Record Daemon (SRRD) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
When a device configured for flow-monitoring receives a specific BGP update message, it is correctly processed internally by the routing protocol daemon (rpd), but when it's sent to SRRD it's encoded incorrectly which leads to a crash and momentary interruption of jflow processing until it automatically restarts. This issue does not affect traffic forwarding itself. This issue affects Junos OS:
All versions before 21.2R3-S9, 21.4 versions before 21.4R3-S10, 22.2 versions before 22.2R3-S6, 22.4 versions before 22.4R3, 23.2 versions before 23.2R1-S2, 23.2R2.
This issue does not affected Junos OS Evolved.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2025-30657?
The severity of CVE-2025-30657 is classified as critical due to its potential to cause a Denial-of-Service (DoS).
How do I fix CVE-2025-30657?
To fix CVE-2025-30657, update your Junos OS to the latest patched version as recommended by Juniper Networks.
Which versions of Junos OS are affected by CVE-2025-30657?
CVE-2025-30657 affects Junos OS versions up to 21.2R3-S9, 21.4R3-S10, 22.2R3-S6, 22.4R3, 23.2R1-S2, and 23.2R2.
What kind of attack can CVE-2025-30657 facilitate?
CVE-2025-30657 can facilitate a Denial-of-Service (DoS) attack by allowing unauthenticated network-based attackers to disrupt service.
Is authentication required to exploit CVE-2025-30657?
No, CVE-2025-30657 can be exploited by unauthenticated attackers, making it particularly dangerous.