CVE-2019-2099 : Exploit Details and Defense Strategies

Android devices are affected by a vulnerability that could lead to local privilege escalation without additional execution privileges. The issue, identified as CVE-2019-2099, was made public on June 3, 2019.

Understanding CVE-2019-2099

This CVE affects Android versions 7.0, 7.1.1, 7.1.2, 8.0, 8.1, and 9. It involves a potential out-of-bounds write in the nfa_rw_store_ndef_rx_buf function, posing a risk of local privilege escalation.

What is CVE-2019-2099?

The vulnerability exists in the nfa_rw_store_ndef_rx_buf function within the nfa_rw_act.cc file.
An out-of-bounds write could occur due to a missing bounds check.
Exploiting this issue could result in local privilege escalation without needing additional execution privileges.
User interaction is required for successful exploitation.

The Impact of CVE-2019-2099

The vulnerability could allow an attacker to escalate privileges on the affected Android devices, potentially leading to unauthorized access to sensitive information or control over the device.

Technical Details of CVE-2019-2099

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

Location: nfa_rw_store_ndef_rx_buf function in nfa_rw_act.cc
Risk: Out-of-bounds write due to missing bounds check
Consequence: Local privilege escalation

Affected Systems and Versions

Android versions 7.0, 7.1.1, 7.1.2, 8.0, 8.1, and 9

Exploitation Mechanism

Requires user interaction for exploitation

Mitigation and Prevention

Protecting systems from CVE-2019-2099 involves taking immediate and long-term security measures.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Educate users about potential social engineering tactics that could exploit this vulnerability.

Long-Term Security Practices

Regularly update and patch all software and firmware on Android devices.
Implement security best practices to minimize the risk of privilege escalation vulnerabilities.

Patching and Updates

Stay informed about security bulletins and updates from Android to address CVE-2019-2099.