This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2021-20237 →
DEBIAN-CVE-2021-20237
An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthe...
Original description
The description as published by the source.
An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages that consume excessive memory if the CURVE/ZAP authentication is disabled on the server, causing a denial of service. The highest threat from this vulnerability is to system availability.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
zeromq3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1"}]}]
Debian:13
zeromq3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1"}]}]
Debian:14
zeromq3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1"}]}]
References
- advisory security-tracker.debian.org