Junos OS SRRD DoS via Improper Encoding before 23.2R1-S2
CVE-2025-30657 Published on April 9, 2025
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.
Vulnerability Analysis
CVE-2025-30657 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Timeline
Initial Publication
Weakness Type
What is an Output Sanitization Vulnerability?
The software prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.
CVE-2025-30657 has been classified to as an Output Sanitization vulnerability or weakness.
Products Associated with CVE-2025-30657
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Affected Versions
Juniper Networks Junos OS:- Before 21.2R3-S9 is affected.
- Version 21.4 and below 21.4R3-S10 is affected.
- Version 22.2 and below 22.2R3-S6 is affected.
- Version 22.4 and below 22.4R3 is affected.
- Version 23.2 and below 23.2R1-S2, 23.2R2 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.