Zero-day vulnerability in Ichitaro

Memory corruption
CVE-2009-1054

Known malware:

Trojan.Tarodrop.H

Vulnerability details

Advisory: SB2009031601 - Remote code execution in JustSystems Ichitaro

Vulnerable component: Ichitaro

CVE-ID: CVE-2009-1054

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C

CWE-ID: CWE-119 - Memory corruption

Description:

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to boundary error when parsing a malformed file. A remote attacker can create a specially crafted file or document using Web PURAGUINBYUA, trick the victim into opening it, trigger memory corruption, run a malicious program and execute arbitrary code on the system with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

External links:

https://www.symantec.com/security_response/writeup.jsp?docid=2009-031608-2424-99
http://www.justsystems.com/jp/info/js09001.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.