CVE-2019-20218 : Security Advisory and Response

SQLite 3.30.1's selectExpander function continues to unwind the WITH stack after encountering a parsing error.

Understanding CVE-2019-20218

The vulnerability in SQLite 3.30.1 allows the selectExpander function to proceed with WITH stack unwinding despite parsing errors.

What is CVE-2019-20218?

The selectExpander function in select.c within SQLite 3.30.1 continues to unwind the WITH stack even after encountering a parsing error.

The Impact of CVE-2019-20218

Exploitation of this vulnerability could lead to unauthorized access to sensitive information stored in SQLite databases.
Attackers may execute arbitrary code or cause denial of service by exploiting this issue.

Technical Details of CVE-2019-20218

SQLite 3.30.1's vulnerability in the selectExpander function is detailed below:

Vulnerability Description

After a parsing error, the selectExpander function in select.c within SQLite 3.30.1 continues to unwind the WITH stack.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: 3.30.1

Exploitation Mechanism

The vulnerability allows attackers to manipulate the WITH stack in SQLite 3.30.1, potentially leading to unauthorized access or code execution.

Mitigation and Prevention

Protect your systems from CVE-2019-20218 with the following measures:

Immediate Steps to Take

Update SQLite to a patched version that addresses the vulnerability.
Monitor for any unusual database activity that could indicate exploitation.

Long-Term Security Practices

Regularly update and patch SQLite and other software to prevent known vulnerabilities.
Implement access controls and encryption to safeguard sensitive database information.

Patching and Updates

Stay informed about security advisories and updates from SQLite and relevant vendors to apply patches promptly.