CVE-2020-15166 Denial of Service in ZeroMQ

2020-09-1115:35:14

CWE-400

GitHub_M

www.cve.org

zeromq

denial of service

tcp transport

curve/zap

vulnerability

patched

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.4

Confidence

High

EPSS

0.015

Percentile

86.9%

JSON

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.

CNA Affected

[
  {
    "product": "libzmq",
    "vendor": "zeromq",
    "versions": [
      {
        "status": "affected",
        "version": "< 4.3.3"
      }
    ]
  }
]