CVE-2021-20234
Last modified
CVE-2021-20234 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 1.07% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zeromq | Libzmq | < 4.3.3 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1921972Issue Tracking, Patch, Third Party Advisory
- https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87Exploit, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1921972Issue Tracking, Patch, Third Party Advisory
- https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87Exploit, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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