Published:2020/11/05  Last Updated:2020/11/05

JVN#00414047
Studyplus App uses a hard-coded API key for an external service

Overview

Studyplus App uses a hard-coded API key for an external service.

Products Affected

  • Studyplus App for Android v6.3.7 and earlier
  • Studyplus App for iOS v8.29.0 and earlier

Description

Studyplus App provided by Studyplus Inc. uses a hard-coded API key for an external service (CWE-798).

Impact

API key for an external service may be obtained by analyzing data in the app.
Note that a user is not directly affected by this vulnerability.

Solution

Update the Application
Update the application to the latest version according to the information provided by the developer.

According to the developer, the API key was removed from the latest app.
The vulnerable API key has been inactivated already, therefore information contained in the vulnerable app is no longer obtained or compromised.

Vendor Status

Vendor Status Last Update Vendor Notes
Studyplus Inc. Vulnerable 2020/11/05

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Base Score: 4.0
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)
CVSS v2 AV:N/AC:L/Au:N/C:P/I:N/A:N
Base Score: 5.0
Access Vector(AV) Local (L) Adjacent Network (A) Network (N)
Access Complexity(AC) High (H) Medium (M) Low (L)
Authentication(Au) Multiple (M) Single (S) None (N)
Confidentiality Impact(C) None (N) Partial (P) Complete (C)
Integrity Impact(I) None (N) Partial (P) Complete (C)
Availability Impact(A) None (N) Partial (P) Complete (C)

Credit

Ryo Sato reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2020-5667
JVN iPedia JVNDB-2020-000070