Zero-day vulnerability in Ichitaro

Improper input validation
CVE-2010-3916

According to Trend Micro, a pair of vulnerabilities of the code execution type namely CVE-2010-3916 and CVE-2010-3915 was uncovered during September 2010 as 0-day flaws.

Known malware:

Trojan.Tarodrop.

Vulnerability details

Advisory: SB2010110401 - Two remote code execution vulnerabilities in JustSystems Ichitaro

Vulnerable component: Ichitaro

CVE-ID: CVE-2010-3916

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-20 - Improper input validation

Description:

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

The vulnerability exists due to unknown error when handling specially crafted office documents. A remote attacker can create a specially crafted document, trick the victim into opening it, cause unspecified error and execute arbitrary code on vulnerable system.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

External links:

http://jvndb.jvn.jp/en/contents/2010/JVNDB-2010-000053.html
http://jvn.jp/en/jp/JVN01948274/index.html
http://blog.trendmicro.com/trendlabs-security-intelligence/arbitrary-code-execution-vulnerabilities-...
http://www.justsystems.com/jp/info/js10003.html
http://www.securityspace.com/smysecure/catid.html?id=1.3.6.1.4.1.25623.1.0.801642
http://archive.feedblitz.com/174203/~3913467
http://news.softpedia.com/news/Vulnerability-in-Japanese-Word-Processor-Exploited-to-Infected-Comput...

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.