CVE-2019-19924 : Exploit Details and Defense Strategies

SQLite 3.30.1 mishandles certain parser-tree rewriting, related to expr.c, vdbeaux.c, and window.c. This is caused by incorrect sqlite3WindowRewrite() error handling.

Understanding CVE-2019-19924

The mishandling of certain parser-tree rewriting in SQLite 3.30.1 can be observed in the code files expr.c, vdbeaux.c, and window.c. This issue arises due to the erroneous error handling present in sqlite3WindowRewrite().

What is CVE-2019-19924?

SQLite 3.30.1 experiences a vulnerability due to mishandling of parser-tree rewriting, leading to incorrect error handling in sqlite3WindowRewrite().

The Impact of CVE-2019-19924

The vulnerability can be exploited to potentially execute arbitrary code or cause a denial of service (DoS) condition.
Attackers may manipulate the SQLite database to achieve unauthorized access or disrupt services.

Technical Details of CVE-2019-19924

SQLite 3.30.1 vulnerability details and affected systems.

Vulnerability Description

The issue stems from the mishandling of parser-tree rewriting in SQLite 3.30.1, specifically in expr.c, vdbeaux.c, and window.c, due to incorrect error handling in sqlite3WindowRewrite().

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious SQLite queries to trigger the erroneous error handling, potentially leading to code execution or service disruption.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-19924.

Immediate Steps to Take

Update SQLite to a patched version that addresses the vulnerability.
Monitor SQLite database activities for any suspicious queries or behavior.
Implement network security measures to restrict access to the SQLite database.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Conduct security assessments and audits of SQLite databases to identify and address potential risks.

Patching and Updates

Apply patches and updates provided by SQLite to fix the vulnerability and enhance overall security.