ESB-2017.2579 - [Juniper] Juniper Contrail: Access confidential data - Remote/unauthenticated 2017-10-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2579
        2017-10 Security Bulletin: Contrail: hard coded credentials
       (CVE-2017-10616) and XML External Entity (XXE) vulnerability
                             (CVE-2017-10617)
                              12 October 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Juniper Contrail
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-10617 CVE-2017-10616 

Original Bulletin: 
   http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10819

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2017-10 Security Bulletin: Contrail: hard coded credentials (CVE-2017-10616) 
and XML External Entity (XXE) vulnerability (CVE-2017-10617)

PRODUCT AFFECTED:

This issue affects Contrail 2.2, 3.0, 3.1, 3.2.

PROBLEM:

The ifmap service that comes bundled with Contrail releases prior to version 
4.0 uses hard coded credentials.

Additionally the ifmap service has an XML External Entity (XXE) vulnerability
that may allow an attacker to retrieve sensitive system files.

No other Juniper Networks products or platforms are affected by this issue.

The hard coded credential vulnerability has been assigned CVE-2017-10616.

The XML External Entity (XXE) vulnerability has been assigned CVE-2017-10617.

CVE-2017-10616 has a CVSSv3 score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVE-2017-10617 has a CVSSv3 score of 5.0 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)

These two vulnerabilities can be chained together and have a combined CVSSv3 
score of 5.8 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N)

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

SOLUTION:

The following software releases have been updated to resolve these specific 
issues: Contrail 2.21.4, 3.0.3.4, 3.1.4.0, 3.2.5.0 and all subsequent 
releases.

WORKAROUND:

The hard coded credentials can be modified manually, however, there are no 
viable workarounds for the XXE vulnerability.

It is good security practice to limit the exploitable attack surface of 
critical infrastructure networking equipment. Use access lists or firewall 
filters to limit access only from trusted, administrative networks or hosts.

MODIFICATION HISTORY:

2017-10-11: 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 
Advisories

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

CVE-2017-10616 at cve.mitre.org

CVE-2017-10617 at cve.mitre.org

CVSS SCORE:

5.8 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N)

RISK LEVEL:

Medium

RISK ASSESSMENT:

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

ACKNOWLEDGEMENTS:

Juniper SIRT would like to acknowledge and thank Guillaume TEISSIER / Orange 
for responsibly reporting this vulnerability.

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