What is CVE-2021-20234?

CVE-2021-20234 is a medium-severity vulnerability in Zeromq Libzmq, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-04-01.

How severe is CVE-2021-20234?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Zeromq Libzmq

CVE-2021-20234

An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.011 (61.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Zeromq Libzmq
N/a Zeromq — versions zeromq 4.3.3

Weakness classification (CWE)

References

secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
secalert@redhat.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20234?: CVE-2021-20234 is a medium-severity vulnerability in Zeromq Libzmq, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-04-01.
How severe is CVE-2021-20234?: Medium severity. CVSS v3 base score is 6.5 out of 10.