CVE-2014-9721

Name	CVE-2014-9721
Description	libzmq before 4.0.6 and 4.1.x before 4.1.1 allows remote attackers to conduct downgrade attacks and bypass ZMTP v3 protocol security mechanisms via a ZMTP v2 or earlier header.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DSA-3255-1
NVD severity	medium (attack range: remote)
Debian Bugs	784366

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
zeromq3 (PTS)	jessie (security), jessie	4.0.5+dfsg-2+deb8u1	fixed
	stretch	4.2.1-4	fixed
	buster, sid	4.2.5-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
zeromq3	source	(unstable)	4.0.5+dfsg-3	medium		784366
zeromq3	source	jessie	4.0.5+dfsg-2+deb8u1	medium	DSA-3255-1

Notes

https://github.com/zeromq/libzmq/issues/1273
https://github.com/zeromq/zeromq4-x/commit/b6e3e0f601e2c1ec1f3aac880ed6a3fe63043e51
http://www.openwall.com/lists/oss-security/2015/05/07/8