CVE-2021-20728 : Security Advisory and Response

This article provides details about CVE-2021-20728, an improper access control vulnerability found in the goo blog App for Android and iOS, versions 1.2.25 and earlier. The vulnerability could allow a remote attacker to lead a user to access an arbitrary website through the app.

Understanding CVE-2021-20728

This section will explain the nature of the vulnerability and its potential impact.

What is CVE-2021-20728?

CVE-2021-20728 refers to an improper access control security flaw identified in the goo blog App for Android and iOS. Attackers can exploit this vulnerability to direct users to malicious websites.

The Impact of CVE-2021-20728

The vulnerability can be exploited by remote attackers to deceive users into accessing arbitrary websites, potentially leading to further security risks.

Technical Details of CVE-2021-20728

In this section, we will delve into the specifics of the vulnerability, including affected systems and potential exploits.

Vulnerability Description

The improper access control vulnerability in goo blog App versions 1.2.25 and earlier for Android and 1.3.3 and earlier for iOS enables attackers to manipulate user access and direct them to malicious sites.

Affected Systems and Versions

The impacted versions include goo blog App for Android (ver. 1.2.25 and earlier) and goo blog App for iOS (ver. 1.3.3 and earlier).

Exploitation Mechanism

Remote threat actors can exploit this vulnerability to trick users into navigating to unauthorized websites through the compromised application.

Mitigation and Prevention

This section outlines steps to mitigate the risks associated with CVE-2021-20728 and secure systems against similar vulnerabilities.

Immediate Steps to Take

Users should refrain from using the goo blog App for Android and iOS versions mentioned in the vulnerability description. Upgrading to the latest secure version is advisable.

Long-Term Security Practices

Employing best security practices, such as avoiding suspicious links and keeping apps updated, can reduce the likelihood of falling victim to such vulnerabilities in the future.

Patching and Updates

NTT Resonant Incorporated, the vendor of the affected goo blog App, may release patches or updates to address this vulnerability. It is crucial for users to promptly install these updates to safeguard their systems.