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             AUSCERT External Security Bulletin Redistribution

                  Eaton ePDU Path Traversal Vulnerability
                              30 January 2017


        AusCERT Security Bulletin Summary

Product:           Eaton ePDU
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2016-9357  

Original Bulletin: 

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Advisory (ICSA-17-026-01)

Eaton ePDU Path Traversal Vulnerability

Original release date: January 26, 2017

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Independent researcher Maxim Rupp has identified a path traversal 
vulnerability in certain legacy Eaton ePDUs. Although the affected products 
are past end-of-life (EoL) and is no longer supported, Eaton has provided 
defense-in-depth mitigation instructions to protect devices that are still in

This vulnerability could be exploited remotely.


Eaton reports that the vulnerability affects the following products:

    EAMxxx prior to June 30, 2015,
    EMAxxx prior to January 31, 2014,
    EAMAxx prior to January 31, 2014,
    EMAAxx prior to January 31, 2014, and
    ESWAxx prior to January 31, 2014.


An unauthenticated attacker may be able to exploit this vulnerability to 
access configuration files.

Impact to individual organizations depends on many factors that are unique to
each organization. NCCIC/ICS-CERT recommends that organizations evaluate the 
impact of this vulnerability based on their operational environment, 
architecture, and product implementation.


Eaton is a US-based company that maintains offices worldwide.

The affected products, ePDUs, are rack-mounted power distribution units. 
According to Eaton, ePDUs are deployed across several sectors including 
Commercial Facilities, Critical Manufacturing, Energy, Water and Wastewater 
Systems, and others. Eaton estimates that these products are used worldwide.




An unauthenticated attacker may be able to access configuration files with a 
specially crafted URL.

CVE-2016-9357[b] has been assigned to this vulnerability. A CVSS v3 base score 
of 5.3 has been assigned; the CVSS vector string is 



This vulnerability could be exploited remotely.


No known public exploits specifically target this vulnerability.


An attacker with a low skill level would be able to exploit this 


Eaton declared these products EoL on January 31, 2014, and June 30, 2015. 
Eaton recommends that users of the affected legacy products follow the 
recommendations outlined in the Defense in depth section of Eatons whitepaper
titled Cybersecurity considerations for electrical distribution systems. It is
located at:

(link is external)

Additional information regarding these and other legacy products can be found
on the Eaton web site at the following location:

(link is external)

ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:

Minimize network exposure for all control system devices and/or systems, and 
ensure that they are not accessible from the Internet.

Locate control system networks and remote devices behind firewalls, and 
isolate them from the business network.

When remote access is required, use secure methods, such as Virtual Private 
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize that VPN is only
as secure as the connected devices.

ICS-CERT reminds organizations to perform proper impact analysis and risk 
assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended 
practices on the ICS-CERT web page. Several recommended practices are 
available for reading and download, including Improving Industrial Control 
Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly 
available in the ICSCERT Technical Information Paper, 
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site.

Organizations observing any suspected malicious activity should follow their 
established internal procedures and report their findings to ICS-CERT for 
tracking and correlation against other incidents.

[a.] CWE-22: Improper Limitation of a Pathname to a Restricted Directory 
     ('Path Traversal') , https://cwe.mitre.org/data/definitions/22.html, 
     web site last accessed January 26, 2017.

[b.] NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-9357
     , NIST uses this advisory to create the CVE web site report. This web 
     site will be active sometime after publication of this advisory.

[c.] CVSS Calculator, https://www.first.org/cvss/calculator/3.0
     #CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S..., web site last accessed 
     January 26, 2017

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