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Japan Vulnerability NotesJVN:25850723

HistoryJul 07, 2021 - 12:00 a.m.

JVN#25850723: GU App for Android fails to restrict access permissions

2021-07-0700:00:00

Japan Vulnerability Notes

jvn.jp

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

0.001 Low

EPSS

Percentile

42.5%

JSON

GU App for Android provided by G.U. CO., LTD. contains an access restriction bypass issue (CWE-939). The App launched by a Custom URL Scheme may lead an user to access an arbitrary URL.

Impact

A remote attacker may lead a user to access an arbitrary website via the vulnerable App. As a result, if the access destination is a malicious website, the user may fall victim to the social engineering attack.

Solution

Update the Application
Update the application to the latest version according to the information provided by the developer.
The vulnerability is fixed in version 5.0.3.

Products Affected

GU App for Android versions from 4.8.0 to 5.0.2

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

0.001 Low

EPSS

Percentile

42.5%

JSON

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