#VU32198 Input validation error in zeromq - CVE-2014-9721

Vulnerability identifier: #VU32198

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-9721

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
zeromq
Other software / Other software solutions

Vendor: ZeroMQ Project

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

zeromq: 4.0.6 - 4.3.2

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-May/159176.html
https://lists.opensuse.org/opensuse-updates/2015-06/msg00018.html
https://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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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.