Vulnerability identifier: #VU82233

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34366

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rakuraku Hagaki
Client/Desktop applications / Office applications
Ichitaro
Client/Desktop applications / Office applications
JUST Office
Client/Desktop applications / Office applications
JUST Government
Client/Desktop applications / Office applications
JUST Police
Client/Desktop applications / Office applications

Vendor: JustSystems Corporation

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error. A remote attacker can trick a victim to open a specially crafted file and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rakuraku Hagaki: All versions

Ichitaro: 2021 - Viewer

JUST Office: 3 - 5

JUST Government: 3 - 5

JUST Police: 3 - 5

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External links
http://jvn.jp/en/jp/JVN28846531/index.html
http://www.justsystems.com/jp/corporate/info/js23002.html
http://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1758

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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.