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).
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.
This issue affects Junos OS on MX Series and SRX Series:
* 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-S5,
* 23.2 versions before 23.2R2-S3,
* 23.4 versions before 23.4R2-S3,
* 24.2 versions before 24.2R1-S2, 24.2R2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | < 21.2R3-S9, 21.4 – < 21.4R3-S10, 22.2 – < 22.2R3-S6, 22.4 – < 22.4R3-S5, 23.2 – < 23.2R2-S3, 23.4 – < 23.4R2-S3, 24.2 – < 24.2R1-S2, 24.2R2 | 21.2R3-S9 |
Advisories 1
- WID-SEC-2025-0777 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 9, 2025
References
- https://supportportal.juniper.net/JSA96466 vendor-advisory