EXPRESSCLUSTER X vulnerable to directory traversal


EXPRESSCLUSTER X from NEC Corporation is software to provide high availability (HA) clustering. EXPRESSCLUSTER X contains an issue in WebManager, which may lead to directory traversal.

Yusuke SAKAI of Cyber Defense Institute, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

Base Metrics: 7.8 (High) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: None
  • Confidentiality Impact: Complete
  • Integrity Impact: None
  • Availability Impact: None

CVSS V3 Severity:
Base Metrics: 7.5 (High) [IPA Score]
  • Access Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None
Affected Products

NEC Corporation
  • EXPRESSCLUSTER X 3.3 for Windows (Internal Ver. 11.31) or earlier
  • EXPRESSCLUSTER X 3.3 for Linux (Internal Ver. 3.3.1-1) or earlier
  • EXPRESSCLUSTER X 3.3 for Solaris (Internal Ver. 3.3.1-1) or earlier


Arbitrary files on the server may be viewed by an attacker who can access to the WebManager.

[Update the Software]
Update to the latest version according to the information provided by the developer.

[Apply a Workaround]
The following workarounds may mitigate the affects of this vulnerability.
* Enable access restriction by IP address
* Enable access restriction by password
Vendor Information

NEC Corporation
  • NEC Security Information : NV16-001 (in Japanese)
CWE (What is CWE?)

  1. Path Traversal(CWE-22) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2016-1145

  1. JVN : JVN#03050861
  2. National Vulnerability Database (NVD) : CVE-2016-1145
Revision History

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