Vulnerability identifier: #VU5904

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-2017-2789

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ichitaro
Client/Desktop applications / Office applications

Vendor: JustSystems Corporation

Description

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

The vulnerability exists due to boundary error when processing Figure stream from a .jtd document. A remote unauthenticated attacker can create a specially crafted .jtd document, trick the victim into opening it, cause heap-based buffer overflow and execute arbitrary code on the target system with privileges of the current user.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ichitaro: 2010 - Pro 3

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External links
http://www.talosintelligence.com/reports/TALOS-2016-0196/
http://www.justsystems.com/jp/info/js17001.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.