Use-After-Free in sqlite3 Ruby Gem

Executive Summary

This vulnerability is a use-after-free issue in the sqlite3-ruby gem (versions 2.9.4 and earlier). It occurs when a SQLite function is redefined with a different number of arguments or text encoding. The original function handler is freed while SQLite may still reference it, leading to memory corruption and potential crashes.

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Detection Guidance

This vulnerability is specific to the sqlite3-ruby gem (versions <= 2.9.4). To detect it, check your gem version with: gem list sqlite3. If the version is 2.9.4 or lower, the system is vulnerable. No network detection is required as this is a local code execution issue.

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Impact Analysis

This vulnerability can cause invalid memory reads, segmentation faults, or crashes in applications using the sqlite3-ruby gem. It may lead to unexpected behavior or denial-of-service conditions under specific code structures, particularly after garbage collection.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. The issue is a use-after-free flaw in the sqlite3-ruby gem that could cause crashes or memory corruption but does not involve data breaches or unauthorized access. Compliance impacts would only occur if exploitation led to system instability affecting data integrity or availability.

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Mitigation Strategies

Upgrade the sqlite3-ruby gem to version 2.9.5 or later using: gem install sqlite3 -v '>=2.9.5'. Alternatively, avoid defining custom SQLite functions with the same name but different arity or text encodings in your code.

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