| Titel | PcapPlusPlus v25.05 Heap-based Buffer Overflow |
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| Beschreibung | 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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| Quelle | ⚠️ https://github.com/seladb/PcapPlusPlus/issues/2155 |
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| Benutzer | TYGLS (UID 94774) |
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| Einreichung | 01.06.2026 05:19 (vor 29 Tagen) |
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| Moderieren | 29.06.2026 06:25 (28 days later) |
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| Status | Akzeptiert |
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| VulDB Eintrag | 374593 [seladb PcapPlusPlus 25.05 Modbus Protocol ModbusLayer.h getLength length Pufferüberlauf] |
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| Punkte | 20 |
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