Installer of WinShot may insecurely load Dynamic Link Libraries


Installer of WinShot contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries (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?)

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

  • WinShot 1.53a and earlier (Installer)


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

[Use ZIP file format WinShot]
When using WinShot, download the ZIP file version and use the software, according to the information provided by the developer. If the old installer version of WinShot obtained from the website before 2018 February 20 resides in your computer, delete it immediately.

Note that this vulnerability affects the installer only, thus users who have already installed WinShot do not need to re-install the software.
Vendor Information

  • WoodyBells : WinShot (in Japanese)
CWE (What is CWE?)

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

  1. CVE-2018-0544

  1. JVN : JVN#01837169
  2. JVN : JVNTA#91240916
  3. National Vulnerability Database (NVD) : CVE-2018-0544
Revision History

  • [2018/03/05]
      Web page was published
  • [2018/06/14]
      References : Content was added