CVE-2018-20346 Explained : Impact and Mitigation

An integer overflow vulnerability in SQLite versions before 3.25.3, specifically affecting the FTS3 extension, allows remote attackers to execute arbitrary code by exploiting FTS3 shadow tables. This vulnerability, named Magellan, poses a significant risk in certain WebSQL scenarios.

Understanding CVE-2018-20346

SQLite before version 3.25.3 encounters an integer overflow leading to a buffer overflow, enabling attackers to execute arbitrary code through SQL statements.

What is CVE-2018-20346?

SQLite versions prior to 3.25.3, with the FTS3 extension enabled, are susceptible to an integer overflow vulnerability, allowing remote attackers to run arbitrary code.

The Impact of CVE-2018-20346

The vulnerability permits attackers to execute arbitrary code by manipulating FTS3 shadow tables, particularly risky in WebSQL environments.

Technical Details of CVE-2018-20346

SQLite versions before 3.25.3 are vulnerable to an integer overflow issue when using the FTS3 extension, leading to a buffer overflow.

Vulnerability Description

The vulnerability arises from crafted changes to FTS3 shadow tables, enabling remote attackers to execute arbitrary code.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions affected: <3.25.3

Exploitation Mechanism

Attackers exploit FTS3 shadow tables
Execute arbitrary code through SQL statements

Mitigation and Prevention

Immediate Steps to Take:

Update SQLite to version 3.25.3 or newer
Monitor vendor security advisories for patches Long-Term Security Practices:
Regularly update software and extensions
Implement secure coding practices
Conduct security audits and code reviews
Educate developers on secure coding practices
Employ network security measures
Use intrusion detection and prevention systems
Patching and Updates:
Apply patches promptly
Stay informed about security updates from vendors