[Japanese]

JVNDB-2021-000043

Installer of Overwolf may insecurely load Dynamic Link Libraries

Overview

Overwolf is a software framework for creating applications for games. The Overwolf Installer contains an issue with the DLL search path (CWE-427), which may lead to insecurely loading Dynamic Link Libraries stored in the same directory where the installer resides.

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


Overwolf Ltd.
  • Overwolf Installer 2.168.0.n 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 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.
Vendor Information

Overwolf Ltd.
CWE (What is CWE?)

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

  1. CVE-2021-20726
References

  1. JVN : JVN#78254777
  2. JVN : JVNTA#91240916
  3. National Vulnerability Database (NVD) : CVE-2021-20726
Revision History

  • [2021/05/21]
      Web page was published

Date Public2021/05/21
Date First Published2021/05/21
Date Last Updated2021/05/21