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ESB-2015.2605 - [Juniper] Juniper ScreenOS: Denial of service - Remote/unauthenticated

Date: 15 October 2015

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             AUSCERT External Security Bulletin Redistribution

       2015-10 Security Bulletin: ScreenOS: Network based denial of
             service vulnerability in ScreenOS (CVE-2015-7750)
                              15 October 2015


        AusCERT Security Bulletin Summary

Product:           Juniper ScreenOS
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7750  

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

2015-10 Security Bulletin: ScreenOS: Network based denial of service 
vulnerability in ScreenOS (CVE-2015-7750)


    Firewalls ISG/NS/SSG Series


    SIRT Advisory

Security Advisories ID: JSA10704

Last Updated: 14 Oct 2015

Version: 1.0

Product Affected:

This issue can affect any Netscreen and ScreenOS Series products running 


A vulnerability in ScreenOS L2TP packet processing may allow a remote network
based attacker to cause a denial of service condition on ScreenOS devices by 
sending a crafted L2TP packet.

This issue is assigned CVE-2015-7750.


This issue has been resolved in ScreenOS 6.3.0r13-dnd1 and 6.3.0r18-dnc1.

This issue is being tracked as PR 1086779 and is visible on the Customer 
Support website.

KB16765 - "In which releases are vulnerabilities fixed?" describes which 
release vulnerabilities are fixed as per our End of Engineering and End of 
Life support policies.


On ScreenOS 6.3.0 this issue can be mitigated by not configuring L2TP 


How to obtain fixed software:

Software release Service Packages are available at
from the "Download Software" links. Select your appropriate Selected Products,
or browse by Series or Technology, once you find the appropriate fixed 
version(s) for your needed platform download and apply the updated version(s)
of choice.

Modification History:

2015-10-14: Initial publication

Related Links:

    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

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


CVSS Score:

7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Risk Level:


Risk Assessment:

Information for how Juniper Networks uses CVSS can be found at KB16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories"

- --------------------------END INCLUDED TEXT--------------------

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