DescriptionA 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).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severityhigh
Debian Bugs919098

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
zeromq3 (PTS)stretch4.2.1-4+deb9u2fixed
stretch (security)4.2.1-4+deb9u4fixed
buster, buster (security)4.3.1-4+deb10u2fixed
bullseye, sid4.3.4-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
zeromq3sourcejessie(not affected)


[jessie] - zeromq3 <not-affected> (Vulnerable code introduced later)

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