JVN#91002412: The installer of The Public Certification Service for Individuals "The JPKI user's software" may insecurely load Dynamic Link Libraries

The installer of The Public Certification Service for Individuals “The JPKI user’s software” provided by Japan Agency for Local Authority Information Systems (J-LIS) contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries.

Impact

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

Solution

Use the latest installer of The Public Certification Service for Individuals “The JPKI user’s software”
Use the latest installer of The Public Certification Service for Individuals “The JPKI user’s software”, according to the information provided by J-LIS.

Do not invoke the installer of The Public Certification Service for Individuals “The JPKI user’s software”
Users who have already installed The Public Certification Service for Individuals “The JPKI user’s software” do not need to uninstall the application, because this vulnerability can be exploited only when installing the software. Thus it is recommended to delete old installers of the software.

Products Affected

Installers of the following “The JPKI user’s software” versions that were available until October 14, 2016, are affected:

• The Public Certification Service for Individuals “The JPKI user’s software (for Windows 7 and later)” Ver3.0.1 and earlier
• The Public Certification Service for Individuals “The JPKI user’s software (for Windows Vista)” Ver3.0.1 and earlier
• The Public Certification Service for Individuals “The JPKI user’s software” Ver2.6 and earlier