What’s Vulnerable › Vulnerabilities

CVE-2023-34366

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-19 · updated 2026-06-17
• Weakness: CWE-416

Description

A use-after-free vulnerability exists in the Figure stream parsing functionality of Ichitaro 2023 1.0.1.59372. A specially crafted document can cause memory corruption, resulting in arbitrary code execution. Victim would need to open a malicious file to trigger this vulnerability.

Affected products

• JustSystems Easy Postcard Max: all versions
• JustSystems Ichitaro 2021: all versions
• Ichitaro: all versions
• Ichitaro 2023: 1.0.1.59372
• JustSystems Ichitaro Government 10: all versions
• JustSystems Ichitaro Government 8: all versions
• JustSystems Ichitaro Government 9: all versions
• JustSystems Ichitaro Pro 3: all versions
• JustSystems Ichitaro Pro 4: all versions
• JustSystems Ichitaro Pro 5: all versions
• JustSystems Just Government 3: all versions
• JustSystems Just Government 4: all versions
• JustSystems Just Government 5: all versions
• JustSystems Just Office 3: all versions
• JustSystems Just Office 4: all versions
• JustSystems Just Office 5: all versions
• JustSystems Just Police 3: all versions
• JustSystems Just Police 4: all versions
• JustSystems Just Police 5: all versions

References

• https://jvn.jp/en/jp/JVN28846531/index.html
• https://talosintelligence.com/vulnerability_reports/TALOS-2023-1758
• https://jvn.jp/en/jp/JVN28846531/index.html
• https://talosintelligence.com/vulnerability_reports/TALOS-2023-1758
• https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1758

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