CVE-2019-19926 Explained : Impact and Mitigation

SQLite 3.30.1's multiSelect function has a vulnerability that can lead to errors in sqlite3WindowRewrite() function calls due to improper error handling during parsing. This issue is a result of an incomplete fix for a previous CVE.

Understanding CVE-2019-19926

This CVE involves mishandling errors in SQLite 3.30.1, potentially leading to security vulnerabilities.

What is CVE-2019-19926?

The multiSelect function in SQLite 3.30.1 fails to handle certain errors correctly during parsing, resulting in errors in sqlite3WindowRewrite() function calls. This vulnerability stems from an incomplete resolution of a prior CVE-2019-19880.

The Impact of CVE-2019-19926

The vulnerability could be exploited by attackers to trigger errors in SQLite, potentially leading to security breaches or system compromise.

Technical Details of CVE-2019-19926

SQLite 3.30.1's vulnerability is detailed below:

Vulnerability Description

The multiSelect function in select.c mishandles errors during parsing, specifically in sqlite3WindowRewrite() calls, due to incomplete error fixes.

Affected Systems and Versions

Product: SQLite
Vendor: N/A
Version: 3.30.1

Exploitation Mechanism

Attackers could exploit this vulnerability by manipulating the parsing process to trigger errors in SQLite, potentially compromising the system.

Mitigation and Prevention

To address CVE-2019-19926, consider the following steps:

Immediate Steps to Take

Update SQLite to a patched version.
Monitor for any unusual activities on SQLite databases.
Implement strict input validation to prevent malicious input.

Long-Term Security Practices

Regularly update SQLite and other software components.
Conduct security audits to identify and address vulnerabilities.

Patching and Updates

Apply patches provided by SQLite to fix the vulnerability.