[Japanese]

JVNDB-2017-000221

Installer of FENCE-Explorer may insecurely load Dynamic Link Libraries and invoke executable files

Overview

FENCE-Explorer provided by FUJITSU BROAD SOLUTION & CONSULTING Inc. is a tool to view and edit a file in "FENCE Briefcase" which is created by FENCE-Pro and other FENCE series software. Installer of FENCE-Explorer contains an issue with the search path for DLL/executable files, which may lead to insecurely loading Dynamic Link Libraries and invoking executable files (CWE-427).

Eili Masami of Tachibana Lab. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

Base Metrics: 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial

CVSS V3 Severity:
Base Metrics: 7.8 (High) [IPA Score]
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
Affected Products


FUJITSU BROAD SOLUTION & CONSULTING INC.
  • FENCE-Explorer for Windows V8.4.1 and earlier

Impact

Arbitrary code may be executed with the privilege of the user invoking the installer.
Solution

[Use the latest installer]
Use the latest installer according to the information provided by the developer.
Users who already have installed FENCE-Explorer do not need to re-install the application, because this issue affects the installer only.

Also note that a user who uses FENCE-Explorer with Portable Application is not affected by this vulnerability because in that case a user can specify a directory to place files before executing FENCE-Explorer. However, the executable file itself contains a DLL preloading vulnerability, therefore a user should be careful not to place a suspicious file sent by the third party in the directory.
Vendor Information

FUJITSU BROAD SOLUTION & CONSULTING INC.
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2017-10855
References

  1. JVN : JVN#57205588
  2. JVN : JVNTA#91240916
Revision History

[2017/09/11]
  Web page was published