SB2025041468 - Improper handling of additional special element in Juniper Junos OS

Security Bulletin ID SB2025041468

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Improper handling of additional special element (CVE-ID: CVE-2025-30656)

CWE-ID: -

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of additional special element error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can 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.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2025-04-Security-Bulletin-Junos-OS-MX-Series-SRX-Series-Processing-of-specific-SIP-INVITE-messages-by-the-SIP-ALG-will-lead-to-an-FPC-crash-CVE-2025-30656