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Debian Security Advisory DSA-3255-1                   security@debian.org
http://www.debian.org/security/                        Alessandro Ghedini
May 10, 2015                           http://www.debian.org/security/faq
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Package        : zeromq3
CVE ID         : none assigned yet
Debian Bug     : 784366

It was discovered that libzmq, a lightweight messaging kernel, is
susceptible to a protocol downgrade attack on sockets using the ZMTP v3
protocol. This could allow remote attackers to bypass ZMTP v3 security
mechanisms by sending ZMTP v2 or earlier headers.

For the stable distribution (jessie), this problem has been fixed in
version 4.0.5+dfsg-2+deb8u1.

For the testing distribution (stretch), this problem has been fixed in
version 4.0.5+dfsg-3.

For the unstable distribution (sid), this problem has been fixed in
version 4.0.5+dfsg-3.

We recommend that you upgrade your zeromq3 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-3255-1: zeromq3 security update

May 10, 2015
It was discovered that libzmq, a lightweight messaging kernel, is susceptible to a protocol downgrade attack on sockets using the ZMTP v3 protocol

Summary

For the stable distribution (jessie), this problem has been fixed in
version 4.0.5+dfsg-2+deb8u1.

For the testing distribution (stretch), this problem has been fixed in
version 4.0.5+dfsg-3.

For the unstable distribution (sid), this problem has been fixed in
version 4.0.5+dfsg-3.

We recommend that you upgrade your zeromq3 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Severity
It was discovered that libzmq, a lightweight messaging kernel, is
susceptible to a protocol downgrade attack on sockets using the ZMTP v3
protocol. This could allow remote attackers to bypass ZMTP v3 security
mechanisms by sending ZMTP v2 or earlier headers.

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