CVE-2020-15166

Published: 11 September 2020

In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public endpoints, even with CURVE/ZAP enabled, are impacted. If a raw TCP socket is opened and connected to an endpoint that is fully configured with CURVE/ZAP, legitimate clients will not be able to exchange any message. Handshakes complete successfully, and messages are delivered to the library, but the server application never receives them. This is patched in version 4.3.3.

From the Ubuntu security team

It was discovered that ZeroMQ mishandled certain network traffic. An unauthenticated attacker could use this vulnerability to cause a denial-of-service and prevent legitimate clients from communicating with ZeroMQ.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
zeromq3
Launchpad, Ubuntu, Debian
Upstream
Released (4.3.3-1)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(4.3.3-4ubuntu1)
Ubuntu 20.10 (Groovy Gorilla) Needed

Ubuntu 20.04 LTS (Focal Fossa) Needed

Ubuntu 18.04 LTS (Bionic Beaver) Needed

Ubuntu 16.04 LTS (Xenial Xerus) Needed

Ubuntu 14.04 ESM (Trusty Tahr) Needed