CVE-2019-1999 : Exploit Details and Defense Strategies

Android kernel vulnerability with potential local privilege escalation due to a double free issue in binder_alloc_free_page.

Understanding CVE-2019-1999

A vulnerability in the Android kernel that could allow local privilege escalation without additional execution privileges.

What is CVE-2019-1999?

The function binder_alloc_free_page in the binder_alloc.c file may result in a double free vulnerability due to incorrect locking. Exploiting this flaw could lead to local privilege escalation in the kernel without needing additional execution privileges. This vulnerability affects the Android operating system, specifically the Android kernel.

The Impact of CVE-2019-1999

Allows local privilege escalation in the Android kernel
No user interaction required for exploitation

Technical Details of CVE-2019-1999

A detailed look at the technical aspects of this vulnerability.

Vulnerability Description

In binder_alloc_free_page of binder_alloc.c, a double free vulnerability exists due to improper locking, potentially leading to local privilege escalation in the kernel without additional execution privileges. User interaction is not required for exploitation.

Affected Systems and Versions

Product: Android
Versions: Android kernel

Exploitation Mechanism

Attackers can exploit the vulnerability to escalate privileges locally within the Android kernel.

Mitigation and Prevention

Measures to address and prevent the CVE-2019-1999 vulnerability.

Immediate Steps to Take

Apply security patches provided by the vendor
Monitor for any unusual system behavior indicating exploitation

Long-Term Security Practices

Regularly update the Android operating system
Implement proper access controls and least privilege principles

Patching and Updates

Stay informed about security bulletins and updates from Android