CVE-2020-15166 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/zeromq/libzmq/pull/3913 https://github.com/zeromq/libzmq/pull/3973 https://github.com/zeromq/libzmq/security/advisories/GHSA-25wp-cf8g-938m https://lists.debian.org/debian-lts-announce/2020/11/msg00017.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BZ5IMNQXDB52JFBXHFLK4AHVORFELNNG/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YFW2ZELCCPS4VLU4OSJOH5YL6KFKTFYW/ https://security.gentoo.org/glsa/202009-12

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5