Published:2021/04/27  Last Updated:2023/03/08

JVN#97434260
Hot Pepper Gourmet App fails to restrict access permissions

Overview

Hot Pepper Gourmet App fails to restrict access permissions.

Products Affected

  • Hot Pepper Gourmet App for Android ver.4.111.0 and earlier
  • Hot Pepper Gourmet App for iOS ver.4.111.0 and earlier

Description

Hot Pepper Gourmet App provided by Recruit Co., Ltd. implements the function to access a requested URL using Custom URL Scheme.
This function contains an improper access control vulnerability (CWE-284) that may allow the vulnerable App to receive an request from an arbitrary App and execute access.
 

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.

  • Hot Pepper Gourmet App for Android ver.4.111.5
  • Hot Pepper Gourmet App for iOS ver.4.111.5

Vendor Status

Vendor Status Last Update Vendor Notes
Recruit Co., Ltd. Vulnerable 2021/04/27

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

CVSS v3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Base Score: 4.3
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:M/Au:N/C:N/I:P/A:N
Base Score: 4.3
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 of BroadBand Security,Inc. 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-2021-20715
JVN iPedia JVNDB-2021-000033

Update History

2023/03/08
Information under the section [Credit] was updated.