Improper Array Index Validation in Samsung Vyond

Executive Summary

This vulnerability is an improper validation of array index issue in Samsung Open Source Vyond. It allows input data manipulation by enabling access to an out-of-bounds memory location in the ENCLAVES array due to missing bounds checking on a user-controlled parameter called eid. The original code directly accessed the array without verifying if eid was within valid bounds, which could lead to a panic from out-of-bounds access.

The fix adds a bounds check to return early if the index is invalid, preventing the out-of-bounds panic. This change affects all SBI functions that rely on the find_enclave() function with user-supplied eid values.

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Detection Guidance

This vulnerability involves improper array index validation in Samsung Open Source Vyond's find_enclave() function. To detect it, inspect the code for direct array access without bounds checking on user-controlled eid parameters. Look for instances where ENCLAVES[eid] is accessed without prior validation of eid against MAX_ENCLAVES. The fix adds a conditional check (if eid >= MAX_ENCLAVES) to prevent out-of-bounds access.

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Impact Analysis

This vulnerability could cause the application to crash due to a panic from out-of-bounds memory access. It may also allow an attacker to manipulate input data by exploiting the missing bounds check, potentially leading to unexpected behavior or further security issues in the system.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR or HIPAA as it involves an out-of-bounds memory access in Samsung Open Source Vyond, which is a technical implementation issue rather than a data protection or privacy violation. Compliance impacts would depend on whether this flaw leads to unauthorized data access or processing, which is not specified in the provided context.

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Mitigation Strategies

Update Samsung Open Source Vyond to the fixed commit be6e297b0c4836e20d73b2f8a40a561ea496ebaa or later to ensure bounds checking is applied to the eid parameter in the find_enclave() function.

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