JVN#82752978: Lhaplus may insecurely load dynamic libraries

Overview

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

Products Affected

Lhaplus Version 1.57 and earlier

Description

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.

Impact

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

Solution

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	http://www7a.biglobe.ne.jp/~schezo/dll_vul.html

References

US-CERT Vulnerability Note VU#707943
Microsoft Windows based applications may insecurely load dynamic libraries
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

Credit

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

Update History

2010/10/15: Published in English.

JVN#82752978 Lhaplus may insecurely load dynamic libraries