CVE-2021-20236
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Zeromq
PublishedMay 28, 2021
First seenMay 28, 2021
Weakness typeCWE-120CWE-120
How to fix
Update
- zeromq zeromq4.3.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zeromq zeromq | v < 4.3.3 | 4.3.3 |
| redhat ceph_storage | 2.0 | — |
| redhat enterprise_linux | 7.0 | — |
| fedoraproject fedora | 33 | — |
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