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A pointer overflow, with code execution, was discovered in ZeroMQ libzmq (aka 0MQ) 4.2.x and 4.3.x before 4.3.1. A v2_decoder.cpp zmq::v2_decoder_t::size_ready integer overflow allows an authenticated attacker to overwrite an arbitrary amount of bytes beyond the bounds of a buffer, which can be leveraged to run arbitrary code on the target system. The memory layout allows the attacker to inject OS commands into a data structure located immediately after the problematic buffer (i.e., it is not necessary to use a typical buffer-overflow exploitation technique that changes the flow of control).

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ZeroMQ libzmq 输入验证错误漏洞

ZeroMQ libzmq（又名0MQ）是一个轻量级分布式消息传递引擎核心库。 ZeroMQ libzmq 4.2.x版本和4.3.1之前的4.3.x版本中的v2_decoder.cpp文件的zmq::v2_decoder_t::size_ready存在安全漏洞。远程攻击者可利用该漏洞覆盖缓冲区边界之外的任意字节，在目标系统上执行任意代码。

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