CVEvulnerability

CVE-2021-20236

9.8 CRITICAL Published 2021-05-28 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-05-28
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-120, CWE-787

Description

A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected configurations

• zeromq zeromq (< 4.3.3) • redhat ceph storage 2.0 • redhat enterprise linux 7.0 • fedoraproject fedora 33

Related

Weakness · CWE (2)

  • CWE-120 Buffer Copy without Checking Size of Input weakness
  • CWE-787 Out-of-bounds Write weakness

References