CVE-2019-2123 : Security Advisory and Response

Android versions 7.1.1, 7.1.2, 8.0, 8.1, and 9 are affected by a vulnerability in the execTransact function in Binder.java that could allow the execution of arbitrary code within a privileged process.

Understanding CVE-2019-2123

This CVE involves a potential local privilege escalation vulnerability in Android devices.

What is CVE-2019-2123?

The execTransact function in Binder.java in Android versions 7.1.1, 7.1.2, 8.0, 8.1, and 9 has a vulnerability that could lead to the execution of arbitrary code within a privileged process by overwriting memory. This could result in local privilege escalation without the need for additional execution privileges, and exploitation does not depend on user interaction.

The Impact of CVE-2019-2123

The vulnerability could allow an attacker to execute arbitrary code within a privileged process, potentially leading to local privilege escalation without requiring additional execution privileges.

Technical Details of CVE-2019-2123

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in execTransact of Binder.java allows for the local execution of arbitrary code in a privileged process due to a memory overwrite.

Affected Systems and Versions

Android versions 7.1.1, 7.1.2, 8.0, 8.1, and 9 are affected by this vulnerability.

Exploitation Mechanism

The vulnerability could be exploited to execute arbitrary code within a privileged process without the need for additional execution privileges or user interaction.

Mitigation and Prevention

Protecting systems from CVE-2019-2123 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor for any signs of unauthorized access or unusual system behavior.
Implement the principle of least privilege to restrict access rights for users and processes.

Long-Term Security Practices

Regularly update and patch all software and firmware to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.
Educate users on security best practices and awareness to prevent social engineering attacks.

Patching and Updates

Ensure that all affected Android devices are updated with the latest security patches to mitigate the risk of exploitation.