NScripter vulnerable to buffer overflow


NScripter is a script engine to build and execute games. NScripter contains a buffer overflow vulnerability due to a flaw in processing save data.

Kusano Kazuhiko reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

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

Naoki Takahashi
  • NScripter prior to Ver3.00 and Games built using NScripter prior to Ver3.00


By processing a specially crafted save data, arbitrary code may be executed.

For developers using NScripter:
[Update and Rebuild the Game]
Update NScripter to the latest version according to the information provided by the developer and rebuild the games.

For users of the games built using NScripter:
[Update the Game]
Update the game to the latest version according to the information provided by each repsective game developer.
Vendor Information

Naoki Takahashi
CWE (What is CWE?)

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

  1. CVE-2015-2991

  1. JVN : JVN#08494613
  2. National Vulnerability Database (NVD) : CVE-2015-2991
  3. IPA SECURITY ALERTS : Security Alert for Vulnerability in NScripter (JVN#08494613) (in Japanese)
Revision History

  • [2015/09/02]
      Web page was published
      References : Content was added