Time-of-Check Time-of-Use Race Condition in Samsung Open Source Escargot

Executive Summary

This vulnerability is a time-of-check time-of-use (TOCTOU) race condition in the Samsung Open Source Escargot JavaScript engine. It involves atomic operations where the state of an ArrayBuffer can change between the time it is checked and the time it is used, potentially leading to unsafe memory access.

Specifically, the issue allows for detached ArrayBuffer access and out-of-bounds memory access during atomic operations, which can cause memory corruption or crashes.

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Impact Analysis

This vulnerability can lead to memory corruption or application crashes when the Escargot JavaScript engine performs atomic operations on ArrayBuffers that have been detached or resized during execution.

Such impacts can cause instability or unexpected behavior in applications relying on this engine, potentially leading to denial of service or other reliability issues.

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Detection Guidance

There is no specific information provided about detection methods or commands to identify this vulnerability on your network or system.

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Mitigation Strategies

To mitigate this vulnerability, update the Escargot JavaScript engine to the fixed version that includes stricter validation checks preventing detached ArrayBuffer access and out-of-bounds memory access.

The fix involves applying the patch committed under commit ID 9e8084e, which adds runtime checks for buffer validity during atomic operations to prevent memory corruption or crashes.

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