Installer of Yahoo! Toolbar (for Internet explorer) may insecurely load Dynamic Link Libraries


Installer of Yahoo! Toolbar (for Internet explorer) contains an issue with the DLL search path, which may lead to insecurely loading Dynamic Link Libraries (CWE-427).

Yuji Tounai of NTT Communications Corporation 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

Yahoo Japan Corporation
  • Installer of Yahoo! Toolbar (for Internet explorer) v8.0.0.6 and earlier, with its timestamp prior to June 13, 2017, 18:18:55


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

[Use the Latest Installer]
Use the latest installer when installing Yahoo! Toolbar (for Internet explorer).
Users who already have installed Yahoo! Toolbar (for Internet explorer) do not need to re-install the toolbar, because this issue affects the installer only.
Vendor Information

Yahoo Japan Corporation
CWE (What is CWE?)

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

  1. CVE-2017-2253

  1. JVN : JVN#02852421
  2. JVN : JVNTA#91240916
  3. National Vulnerability Database (NVD) : CVE-2017-2253
Revision History

  • [2017/07/12]
      Web page was published
      References : Content was added