CVE-2019-2178 : 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 rw_t4t_sm_read_ndef function that could lead to local privilege escalation in the NFC service.

Understanding CVE-2019-2178

This CVE identifies a potential elevation of privilege issue in specific Android versions due to a missing bounds check in the NFC service.

What is CVE-2019-2178?

The vulnerability in the rw_t4t_sm_read_ndef function of Android versions 7.1.1, 7.1.2, 8.0, 8.1, and 9 could allow an attacker to perform an out-of-bounds write, leading to local privilege escalation without requiring additional execution privileges.

The Impact of CVE-2019-2178

The risk of local privilege escalation in the NFC service poses a significant threat as user interaction is not necessary for exploitation.

Technical Details of CVE-2019-2178

The technical aspects of the vulnerability in Android versions 7.1.1, 7.1.2, 8.0, 8.1, and 9.

Vulnerability Description

The issue stems from a missing bounds check in the rw_t4t_sm_read_ndef function, allowing for an out-of-bounds write.

Affected Systems and Versions

Android 7.1.1
Android 7.1.2
Android 8.0
Android 8.1
Android 9

Exploitation Mechanism

Attackers can exploit this vulnerability to achieve local privilege escalation in the NFC service without needing additional execution privileges.

Mitigation and Prevention

Steps to address and prevent the CVE-2019-2178 vulnerability.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor for any unusual NFC service behavior.

Long-Term Security Practices

Regularly update Android devices to the latest software versions.
Implement proper access controls and permissions for NFC service.

Patching and Updates

Stay informed about security bulletins and updates from Android.