JVN#01547302
ALZip vulnerable to buffer overflow
Overview
ALZip provided by ESTsoft Japan Corp. contains a buffer overflow vulnerability.
Products Affected
- ALZip v8.21 and earlier
Description
ALZip is a file compression/extraction software from ESTsoft Japan Corp.
ALZip contains a buffer overflow vulnerability due to improper handling
of mim files.
Impact
When opening a specially crafted file, arbitrary code may be executed.
Solution
Re-install the software
Download ALZip 8.21 after June 29, 2011 12:00 (JST) from the developer's website, and then re-install it.
According to the developer, "Automatic updates will not be provided since the version number did not change".
In the fixed version, the Readme file contains a statement, "A fix for a issue when unpacking a specific file type"
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
Analyzed on 2011.06.29
| Measures | Conditions | Severity |
|---|---|---|
| Access Required | can be attacked over the Internet using packets |
|
| Authentication | anonymous or no authentication (IP addresses do not count) |
|
| 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 |
|
| Exploit Complexity | some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls) |
|
Credit
Takahiko Funakubo of Fourteenforty Research Institute, Inc reported this vulnerability to IPA.
JPCERT/CC coordinated with the vendor under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert | |
| JPCERT Reports | |
| CERT Advisory |
|
| CPNI Advisory |
|
| TRnotes |
|
| CVE |
CVE-2011-1336 |
| JVN iPedia |
JVNDB-2011-000048 |
Update History
- 2011/06/30
- Information under the sections "References" were modified.