JVN#34729123 Explzh buffer overflow vulnerability

Overview

Explzh contains a buffer overflow vulnerability.

Products Affected

Explzh Ver.5.62 and earlier

Note that versions of Explzh that contain "Arcext.dll" version 2.16.1 and earlier are vulnerable.

Description

Explzh, a file compression/decompression software supporting multiple compression file formats, contains a buffer overflow vulnerability when processing a LHA file header.

Impact

When processing a specially crafted LHA file, a remote attacker may be able to execute arbitrary code.

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
pon software	Vulnerable	2010/06/22

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2010.06.22

Measures	Conditions	Severity
Access Required	Routed - can be attacked over the Internet using packets	High
Authentication	None - anonymous or no authentication (IP addresses do not count)	High
User Interaction Required	Simple - 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	Medium
Exploit Complexity	Low-Medium - some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)	Medium-High

Description of each analysis measures

Credit

Kenju Takano 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
JVN iPedia	JVNDB-2010-000026