[Japanese]

JVNDB-2022-000081

Lemon8 App fails to restrict access permissions

Overview

Lemon8 by ByteDance K.K. provides the function to access a requested URL using Custom URL Scheme/DeepLink. The App does not restrict access to the function properly (CWE-939) which may be exploited to direct the App to access any sites.

Ryo Sato of BroadBand Security,Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None
CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products


ByteDance
  • Lemon8 App for Android versions prior to 3.3.5
  • Lemon8 App for iOS versions prior to 3.3.5

Impact

A remote attacker may lead a user to access an arbitrary website via the vulnerable App. As a result, the user may become a victim of a phishing attack.
Solution

[Update the Application]
Update the application to the latest version according to the information provided by the developer.
The developer has released the following versions:
  • Lemon8 App for Android version 3.3.5

  • Lemon8 App for iOS version 3.3.5
Vendor Information

ByteDance
CWE (What is CWE?)

  1. Permissions(CWE-264) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2022-41797
References

  1. JVN : JVN#10921428
  2. National Vulnerability Database (NVD) : CVE-2022-41797
Revision History

  • [2022/10/19]
      Web page was published
  • [2024/06/12]
      References : Content was added

Date Public2022/10/19
Date First Published2022/10/19
Date Last Updated2024/06/12