Vulnerability CVE-2014-9721
Published: 2015-06-03

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.

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Zeromq -> Zeromq 

 References:
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/159176.html
http://lists.opensuse.org/opensuse-updates/2015-06/msg00018.html
http://www.debian.org/security/2015/dsa-3255
https://github.com/zeromq/libzmq/issues/1273
https://github.com/zeromq/zeromq4-x/commit/b6e3e0f601e2c1ec1f3aac880ed6a3fe63043e51
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