RW-5100 driver installer may insecurely load Dynamic Link Libraries


RW-5100 driver installer for IC Card Reader/Writer devices provided by Sharp Corporation contains an issue with the DLL search path, which may lead to insecurely load Dynamic Link Libraries (CWE-427).

Yuji Tounai of NTT Communications Corporation and BlackWingCat of PinkFlyingWhale 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

Sharp Corporation
  • RW-5100 driver installer for Windows 7 version (RW5100V1.0.0.9_A_win.exe) and earlier
  • RW-5100 driver installer for Windows 8.1 version (RW5100V1.0.1.0_A_win8.exe) and earlier


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

[Use the latest installer]
Use the latest installer according to the information provided by the developer.
The following versions address the issue.

* RW-5100 driver installer for Windows 7 version (RW51Inst.exe)
* RW-5100 driver installer for Windows 8.1 version (RW51Inst.exe)

Users who already have installed the driver software do not need to re-install the software, because this issue affects the installers only.
Vendor Information

Sharp Corporation
CWE (What is CWE?)

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

  1. CVE-2017-2191

  1. JVN : JVN#51274854
  2. JVN : JVNTA#91240916
  3. National Vulnerability Database (NVD) : CVE-2017-2191
Revision History

  • [2017/06/01]
      Web page was published
      Overview was modified
      Affected Products : Product versions were modified
      Solution was modified
      References : Content was added