CVE-2021-21386 Explained : Impact and Mitigation

APKLeaks prior to v2.0.3 is impacted by a critical vulnerability (CVE-2021-21386) that allows remote attackers to execute arbitrary OS commands via a malicious package name. The issue is fixed in version v2.0.6-dev.

Understanding CVE-2021-21386

APKLeaks, an open-source project for scanning APK files, is vulnerable to OS command injection, potentially leading to unauthorized command execution and data exposure.

What is CVE-2021-21386?

CVE-2021-21386 affects APKLeaks versions prior to v2.0.6-dev, allowing attackers to run malicious commands through the application manifest file using a manipulated package name.

The Impact of CVE-2021-21386

The vulnerability is rated as critical with a base score of 9.3, posing high confidentiality and integrity risks. Attackers can exploit this flaw remotely without requiring privileges.

Technical Details of CVE-2021-21386

APKLeaks v2.0.3 and below do not properly validate input, enabling threat actors to inject and execute arbitrary commands remotely.

Vulnerability Description

The improper neutralization of argument delimiters vulnerability enables command injection, potentially resulting in unauthorized system commands execution.

Affected Systems and Versions

APKLeaks versions prior to v2.0.6-dev are vulnerable. Users are advised to update to version v2.0.6-dev or above to mitigate the risk.

Exploitation Mechanism

Attackers leverage a manipulated package name in the application manifest to execute malicious commands, compromising system integrity and confidentiality.

Mitigation and Prevention

It is crucial to take immediate action to secure systems and prevent exploitation of CVE-2021-21386.

Immediate Steps to Take

Update APKLeaks to version v2.0.6-dev or above.
Restrict access to vulnerable systems.

Long-Term Security Practices

Implement secure coding practices to prevent command injection vulnerabilities.
Regularly monitor for security advisories and updates.

Patching and Updates

Developers should prioritize patching vulnerable systems promptly to address the CVE-2021-21386 security flaw.