DX Library vulnerable to buffer overflow


DX Library is an open source library for creating Windows application. DX Library contains a buffer overflow vulnerability due to a flaw in processing an inner function CL_vsprintf().

Tomoya Kitagawa 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 8.1 (High) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • 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

Takumi Yamada
  • DX Library for BorlandC++ Ver3.15e and earlier
  • DX Library for Gnu C++ Ver3.15e and earlier
  • DX Library for VisualC# Ver3.15e and earlier
  • DX Library for VisualC++ Ver3.15e and earlier


When processing a specially crafted string, an application built using DX Library may allow an arbitrary code to be executed with the privilege of the user running the application.

[Update DX Library and rebuild the application]
Update to the latest version of DX Library and rebuild the application.
Vendor Information

Takumi Yamada
CWE (What is CWE?)

  1. Buffer Errors(CWE-119) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2016-1131

  1. JVN : JVN#49476817
  2. National Vulnerability Database (NVD) : CVE-2016-1131
  3. IPA SECURITY ALERTS : Security Alert for Vulnerability in DX Library (JVN#49476817) (in Japanese)
Revision History

  • [2016/01/05]
      Web page was published
      References : Content was added
      Vendor Information : URL modified