#VU82235 Type Confusion in JustSystems Corporation products - CVE-2023-38128

Vulnerability identifier: #VU82235

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-38128

CWE-ID: CWE-843

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a type confusion error. A remote attacker can trick a victim to open a specially crafted file, trigger a type confusion error and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rakuraku Hagaki: All versions

Ichitaro: Viewer - 2023

JUST Office: 3 - 5

JUST Government: 3 - 5

JUST Police: 3 - 5

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External links
https://jvn.jp/en/jp/JVN28846531/index.html
https://www.justsystems.com/jp/corporate/info/js23002.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.