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Debian Security Advisory DSA 3255-1 (zeromq3 - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
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.
Affected Software
Affected Software
zeromq3 on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
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.