| Título | PcapPlusPlus v25.05 Heap-based Buffer Overflow |
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| Descrição | A heap-based buffer over-read vulnerability exists in PcapPlusPlus's Telnet protocol parsing module within the pcpp::TelnetLayer::getSubCommand function at TelnetLayer.cpp:210. The flaw is caused by insufficient boundary validation when handling truncated Telnet subnegotiation packet buffers. When processing a maliciously crafted truncated Telnet packet with a buffer length smaller than 3 bytes, the function fails to properly restrict out-of-bounds memory access. It directly reads data at the pos[2] offset without validating the actual buffer size, triggering a 1-byte out-of-bounds heap read and resulting in program crash during packet parsing. Remote attackers can exploit this vulnerability by supplying a specially malformed Telnet network packet to trigger invalid heap memory access, leading to a denial-of-service (DoS) condition and potential sensitive memory information disclosure. |
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| Fonte | ⚠️ https://github.com/seladb/PcapPlusPlus/issues/2152 |
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| Utilizador | TYGLS (UID 94774) |
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| Submissão | 01/06/2026 05h17 (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 | 374592 [seladb PcapPlusPlus 25.05 Telnet Subnegotiation Packet TelnetLayer.cpp getSubCommand Excesso de tampão] |
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| Pontos | 20 |
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