What’s Vulnerable › Vulnerabilities

CVE-2023-22367

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-13 · updated 2026-06-17
• Weakness: CWE-295

Description

Ichiran App for iOS versions prior to 3.1.0 and Ichiran App for Android versions prior to 3.1.0 improperly verify server certificates, which may allow a remote unauthenticated attacker to eavesdrop on an encrypted communication via a man-in-the-middle attack.

Affected products

• Betrend Corporation and ICHIRAN INC. Ichiran App for iOS and Ichiran App for Android: before 3.1.0 — fixed in 3.1.0

How to fix

Upgrade to a fixed version: Betrend Corporation and ICHIRAN INC. Ichiran App for iOS and Ichiran App for Android 3.1.0. Check the vendor advisory for mitigations.

References

• https://apps.apple.com/jp/app/%E4%B8%80%E8%98%AD%E5%85%AC%E5%BC%8F%E3%82%A2%E3%83%97%E3%83%AA/id1118806170
• https://jvn.jp/en/jp/JVN11257333/
• https://play.google.com/store/apps/details?id=jp.co.ichiran.app&hl=ja
• https://apps.apple.com/jp/app/%E4%B8%80%E8%98%AD%E5%85%AC%E5%BC%8F%E3%82%A2%E3%83%97%E3%83%AA/id1118806170
• https://jvn.jp/en/jp/JVN11257333/
• https://play.google.com/store/apps/details?id=jp.co.ichiran.app&hl=ja

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