Remote code execution in JustSystems Hanako



Published: 2017-04-21
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-2154
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Hanako
Client/Desktop applications / Office applications

Vendor JustSystems Corporation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU6372

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 - Improper input validation

Exploit availability: No

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

External links

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


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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



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