| Título | PcapPlusPlus v25.05 Heap-based Buffer Overflow |
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| Descrição | A heap-based buffer over-read vulnerability exists in PcapPlusPlus's Modbus protocol parsing module within the pcpp::ModbusLayer::getLength function at ModbusLayer.cpp:45. The flaw is caused by missing validation on the packet buffer length before accessing critical Modbus header fields. When processing a maliciously crafted truncated Modbus TCP packet that is shorter than the required 6-byte standard header length, the function directly reads the length field without checking the actual m_DataLen value. This unsafe memory access triggers a 2-byte out-of-bounds heap read, which corrupts memory and causes an immediate program crash during packet parsing and string conversion. Remote attackers can exploit this vulnerability by supplying a specially malformed Modbus network packet, triggering invalid out-of-bounds heap memory access to cause a denial-of-service (DoS) condition and potential sensitive memory information disclosure. |
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| Fonte | ⚠️ https://github.com/seladb/PcapPlusPlus/issues/2155 |
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| Utilizador | TYGLS (UID 94774) |
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| Submissão | 01/06/2026 05h19 (há 1 mês) |
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| Moderação | 29/06/2026 06h25 (28 days later) |
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| Estado | Aceite |
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| Entrada VulDB | 374593 [seladb PcapPlusPlus 25.05 Modbus Protocol ModbusLayer.h getLength length Excesso de tampão] |
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| Pontos | 20 |
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