Heap Buffer Overflow in IEC 60870-5-104 Implementation

Executive Summary

This vulnerability involves a crafted IEC 60870-5-104 I-frame with TypeID 104 (C_TS_NA_1) that has an inflated object count. This causes the function TestCommand_getFromBuffer to read one byte past the end of a heap-allocated message buffer, potentially leading to memory corruption or crashes.

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Detection Guidance

This vulnerability involves a crafted IEC 60870-5-104 I-frame with TypeID 104 causing a buffer overflow. Detection requires monitoring network traffic for malformed IEC 60870-5-104 packets, particularly those with inflated object counts in TypeID 104 messages. Use protocol analyzers like Wireshark with IEC 60870-5-104 dissectors to inspect traffic for anomalies.

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Impact Analysis

This vulnerability could allow an attacker to cause denial-of-service conditions, crash the affected system, or potentially execute arbitrary code. It may disrupt operations in industrial control systems using IEC 60870-5-104 protocol.

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Compliance Impact

The vulnerability involves a heap buffer overflow in IEC 60870-5-104 protocol handling, which could lead to memory corruption and potential unauthorized access or data leakage. This may impact compliance with GDPR by risking personal data exposure and HIPAA by compromising protected health information integrity.

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Mitigation Strategies

Update or patch the affected IEC 60870-5-104 implementation to fix the buffer overflow issue in TestCommand_getFromBuffer. Monitor vendor advisories for updates and apply them promptly.

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