CVE-2019-6250

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).

Affected packages (3)

• Alpine/zeromqfrom 0, < 4.3.1-r0
• Debian/zeromq3from 0, < 4.3.1-1
• Debian/zeromq3from 0, < 4.2.1-4+deb9u1

CVSS scores

References (2)

• ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2019-6250
• ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2019-6250