A pointer overflow, with code execution, was discovered in ZeroMQ...

Vulnerability Description

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).

References

• https://www.debian.org/security/2019/dsa-4368
• https://github.com/zeromq/libzmq/issues/3351
• https://github.com/zeromq/libzmq/releases/tag/v4.3.1
• https://security.gentoo.org/glsa/201903-22