CVE-2019-16168 : Security Advisory and Response

SQLite through 3.29.0 has a vulnerability in the whereLoopAddBtreeIndex function in sqlite3.c, leading to a severe division by zero issue in the query planner.

Understanding CVE-2019-16168

This CVE involves a vulnerability in SQLite that can cause crashes in applications due to missing validation.

What is CVE-2019-16168?

SQLite version 3.29.0 and below are susceptible to a severe division by zero issue in the query planner due to inadequate validation in the whereLoopAddBtreeIndex function in sqlite3.c.

The Impact of CVE-2019-16168

The vulnerability can lead to crashes in browsers or other applications utilizing SQLite, impacting their stability and potentially causing denial of service.

Technical Details of CVE-2019-16168

SQLite vulnerability details and affected systems.

Vulnerability Description

The function whereLoopAddBtreeIndex in sqlite3.c lacks validation of a certain field called sz in sqlite_stat1, leading to a severe division by zero issue in the query planner.

Affected Systems and Versions

Product: SQLite
Vendor: N/A
Versions affected: 3.29.0 and below

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious SQLite database that triggers the division by zero issue, causing the application to crash.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-16168.

Immediate Steps to Take

Update SQLite to a version that includes a patch for the vulnerability.
Monitor vendor advisories for patches and apply them promptly.

Long-Term Security Practices

Regularly update software and libraries to the latest secure versions.
Conduct security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches provided by SQLite or respective vendors to address the vulnerability and enhance system security.