critical9.8
CVE-2021-20236
A flaw was found in the ZeroMQ server in versions before 4.3.3.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Zeromq | Zeromq | before 4.3.3 |
| Redhat | Ceph Storage | Version 2.0 |
| Redhat | Enterprise Linux | Version 7.0 |
| Fedoraproject | Fedora | Version 33 |