← Back

CVE-2021-20236

nvd nist
Published: May 28, 2021Modified: Jun 17, 2026

JSON object

Loading...
9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

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 (4)

Zeromq
1 product
Zeromq
Redhat
2 products
Ceph Storage
Enterprise Linux
Fedoraproject
1 product
Fedora
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Zeromq
Before 4.3.3
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Ceph Storage
Version 2.0
Enterprise Linux
Version 7.0
Configuration C
1 vulnerable
Vulnerable SoftwareAffected Versions
Fedora
Version 33

Related CWEs

CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
CWE-787
Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.

References (4)

Source: secalert@redhat.com
Issue TrackingThird Party Advisory
Source: secalert@redhat.com
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory

Timeline

No history available yet.