CVE-2025-30656
Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
09/04/2025
Last modified:
11/04/2025
Description
An Improper Handling of Additional Special Element vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MS-MPC, MS-MIC and SPC3, and SRX Series, allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).<br />
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If the SIP ALG processes specifically formatted SIP invites, a memory corruption will occur which will lead to a crash of the FPC processing these packets. Although the system will automatically recover with the restart of the FPC, subsequent SIP invites will cause the crash again and lead to a sustained DoS.<br />
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This issue affects Junos OS on MX Series and SRX Series: <br />
<br />
* all versions before 21.2R3-S9,<br />
* 21.4 versions before 21.4R3-S10,<br />
* 22.2 versions before 22.2R3-S6,<br />
* 22.4 versions before 22.4R3-S5,<br />
* 23.2 versions before 23.2R2-S3,<br />
* 23.4 versions before 23.4R2-S3,<br />
* 24.2 versions before 24.2R1-S2, 24.2R2.
Impact
Base Score 4.0
8.70
Severity 4.0
HIGH
Base Score 3.x
7.50
Severity 3.x
HIGH