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.
References (2)
Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1921976
Patch, Third Party Advisory x_refsource_misc
https://github.com/zeromq/libzmq/security/advisories/GHSA-qq65-x72m-9wr8
Scores
CVSS v3
9.8
EPSS
0.0032
EPSS Percentile
54.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-120
CWE-787
Status
published
Products (4)
fedoraproject/fedora
33
redhat/ceph_storage
2.0
redhat/enterprise_linux
7.0
zeromq/zeromq
< 4.3.3
Published
May 28, 2021
Tracked Since
Feb 18, 2026