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                            CERT-Renater

                Note d'Information No. 2025/VULN225

_____________________________________________________________________

DATE                : 10/04/2025

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Junos OS versions prior to 21.2R3-S9, 21.4R3-S9,
                     22.2R3-S5, 22.4R3-S6, 23.2R2-S3, 23.4R2, 24.2R1.

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https://supportportal.juniper.net/s/article/2025-04-Security-Bulletin-Junos-OS-SRX-Series-Transmission-of-specific-control-traffic-sent-out-of-a-DS-Lite-tunnel-results-in-flowd-crash-CVE-2025-30645?language=en_US
_____________________________________________________________________

2025-04 Security Bulletin: Junos OS: SRX Series: Transmission of
specific control traffic sent out of a DS-Lite tunnel results in
flowd crash (CVE-2025-30645)


Article ID
JSA96455

Created
2025-04-09

Last Updated
2025-04-09


Product Affected
This issue affects all versions of Junos OS. Affected platforms:
SRX Series.


Severity
High

Severity Assessment (CVSS) Score

CVSS: v3.1: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS: v4.0: 8.7 (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/AU:Y/R:A/V:C/RE:M/U:Green)


Problem

A NULL Pointer Dereference vulnerability in the flow daemon
(flowd) of Juniper Networks Junos OS on SRX Series allows an
attacker causing specific, valid control traffic to be sent out
of a Dual-Stack (DS) Lite tunnel to crash the flowd process,
resulting in a Denial of Service (DoS).  Continuous triggering of
specific control traffic will create a sustained Denial of
Service (DoS) condition.

On all SRX platforms, when specific, valid control traffic needs
to be sent out of a DS-Lite tunnel, a segmentation fault occurs
within the flowd process, resulting in a network outage until the
flowd process restarts.


This issue affects Junos OS on SRX Series:

    All versions before 21.2R3-S9,
    from 21.4 before 21.4R3-S9,
    from 22.2 before 22.2R3-S5,
    from 22.4 before 22.4R3-S6,
    from 23.2 before 23.2R2-S3,
    from 23.4 before 23.4R2.

 

Exploitation of this issue requires DS-Lite tunneling to be
configured:

[ services softwire softwire-concentrator ds-lite ...]

 

Juniper SIRT is not aware of any malicious exploitation of this
vulnerability.

This issue was found during internal product security testing or
research.


Solution

The following software releases have been updated to resolve this
specific issue: Junos OS 21.2R3-S9, 21.4R3-S9, 22.2R3-S5,
22.4R3-S6, 23.2R2-S3, 23.4R2, 24.2R1, and all subsequent releases.

 

This issue is being tracked as 1779792 which is visible on the
Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are
beyond End of Engineering (EOE) or End of Life (EOL).
Workaround

There are no known workarounds for this issue.


Severity Assessment
Information for how Juniper Networks uses CVSS can be found at
KB 16446 "Common Vulnerability Scoring System (CVSS) and
Juniper's Security Advisories."


Modification History

2025-04-09: Initial Publication


Related Information

    KB16613: Overview of the Juniper Networks SIRT Quarterly
Security Bulletin Publication Process

    KB16765: In which releases are vulnerabilities fixed?
    KB16446: Common Vulnerability Scoring System (CVSS) and
Juniper's Security Advisories

    Report a Security Vulnerability - How to Contact the Juniper
Networks Security Incident Response Team


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