Vulnerability identifier: #VU6372

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-2154

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Hanako
Client/Desktop applications / Office applications

Vendor: JustSystems Corporation

Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to improper input validation when processing Hanako documents. A remote attacker can create a specially crafted document, trick the victim into opening and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Hanako: 2015 - 2017

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External links
http://www.justsystems.com/jp/info/js17002.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.