CVE-2025-30659: Junos OS: SRX Series: A device configured for vector routing crashes when receiving malformed traffic
First published: Wed Apr 09 2025(Updated: )
An Improper Handling of Length Parameter Inconsistency vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When a device configured for Secure Vector Routing (SVR) receives a specifically malformed packet the PFE will crash and restart. This issue affects Junos OS on SRX Series: * All 21.4 versions, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R2. This issue does not affect versions before 21.4.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =21.4<22.2R3-S6<22.4R3-S6<23.2R2-S3<23.4R2-S4<24.2R2 |
Remedy
The following software releases have been updated to resolve this specific issue: 22.2R3-S6, 22.4R3-S6, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-30659?
CVE-2025-30659 has been rated as a critical severity vulnerability due to its potential to cause a Denial-of-Service attack.
How do I fix CVE-2025-30659?
To fix CVE-2025-30659, update affected Junos OS to the latest version that is not vulnerable.
Who is affected by CVE-2025-30659?
CVE-2025-30659 affects devices running Junos OS versions 21.4 and below up to versions 22.2R3-S6, 22.4R3-S6, 23.2R2-S3, 23.4R2-S4, and 24.2R2.
What type of vulnerability is CVE-2025-30659?
CVE-2025-30659 is classified as an Improper Handling of Length Parameter Inconsistency vulnerability.
Can CVE-2025-30659 be exploited remotely?
Yes, CVE-2025-30659 can be exploited by unauthenticated, network-based attackers to affect the availability of the system.
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