Published:2010/10/12  Last Updated:2010/10/15

Lhaplus may insecurely load dynamic libraries


Lhaplus may use unsafe methods for determining how to load DLLs.

Products Affected

  • Lhaplus Version 1.57 and earlier


Lhaplus is a file compression/extraction software supporting multiple file formats. Lhaplus loads certain DLL's when files are extracted. Lhaplus contains an issue with the DLL search path, which may lead to insecurely loading dynamic libraries.


An attacker may execute arbitrary code with the privilege of running the application.


Update the Software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Schezo vulnerable 2010/10/15


  1. US-CERT Vulnerability Note VU#707943
    Microsoft Windows based applications may insecurely load dynamic libraries
  2. IPA
    Security Alert for Vulnerability in Lhaplus

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2010.10.12

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file
  • Mid
Exploit Complexity the user must be convinced to take a difficult or suspicious action. If the honest user must have elevated privileges, they are likely to be more suspiciouse
  • High

Description of each analysis measures


Hitachi Incident Response Team and Makoto Shiotsuki reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2010-2368
JVN iPedia JVNDB-2010-000037

Update History

Published in English.