The installer of SKYSEA Client View may insecurely load Dynamic Link Libraries


SKYSEA Client View provided by Sky Co., LTD. is an Enterprise IT Asset Management Tool.
The installer of SKYSEA Client View contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries (CWE-427).

shogo kumamaru of LAC Co.,Ltd reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

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
CVSS V2 Severity:
Base Metrics 6.8 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

Sky Co., LTD.
  • SKYSEA Client View Ver.1.020.05b to Ver.16.001.01g


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

[Use the latest installer]
Use the latest installers provided by the developer.
Also when executing the installer, be sure to check there are no suspicious files in the directory where the installer resides.

Users who already have installed the software do not need to re-install, because this issue affects the installers only, i.e. when the product is installed and uninstalled.

In addition, Ver.13.000.10o and earlier are End-of-Support, thus the developer recommends users to upgrade the product to the latetst version.
Vendor Information

Sky Co., LTD.
CWE (What is CWE?)

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

  1. CVE-2021-20616

  1. JVN : JVN#69635538
  2. JVN : Japan Vulnerability Notes JVNTA#91240916
Revision History

  • [2021/01/12]
      Web page was published