CVE-2019-2091 Explained : Impact and Mitigation

Android devices are affected by a vulnerability in the GetPermittedAccessibilityServicesForUser function, potentially leading to privilege escalation without additional permissions.

Understanding CVE-2019-2091

This CVE identifies a vulnerability in Android devices that could allow for privilege escalation at a local level.

What is CVE-2019-2091?

The vulnerability lies in the GetPermittedAccessibilityServicesForUser function of DevicePolicyManagerService.java, enabling a permissions bypass that could result in privilege escalation without requiring extra permissions.

The Impact of CVE-2019-2091

The vulnerability could be exploited locally, allowing an attacker to escalate privileges without the need for additional permissions, posing a risk of unauthorized access.

Technical Details of CVE-2019-2091

Android devices running specific versions are susceptible to this vulnerability.

Vulnerability Description

The flaw in the GetPermittedAccessibilityServicesForUser function could be exploited to bypass permissions, potentially leading to privilege escalation.

Affected Systems and Versions

Product: Android
Versions: Android-7.0, Android-7.1.1, Android-7.1.2, Android-8.0, Android-8.1

Exploitation Mechanism

The vulnerability allows for the bypassing of permissions, enabling an attacker to escalate privileges locally without requiring additional permissions.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor for any unauthorized access or privilege escalation attempts.
Implement least privilege access controls to limit potential impact.

Long-Term Security Practices

Regularly update and patch all software and firmware on Android devices.
Conduct security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Stay informed about security bulletins and updates from Android to apply patches as soon as they are released.