Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.02
EPSS Ranking 82.8%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 4.3
References
Products affected by CVE-2021-20237
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cpe:2.3:a:zeromq:libzmq:4.2.0
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cpe:2.3:a:zeromq:libzmq:4.2.1
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cpe:2.3:a:zeromq:libzmq:4.2.2
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cpe:2.3:a:zeromq:libzmq:4.2.3
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cpe:2.3:a:zeromq:libzmq:4.2.4
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cpe:2.3:a:zeromq:libzmq:4.2.5
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cpe:2.3:a:zeromq:libzmq:4.3.0
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cpe:2.3:a:zeromq:libzmq:4.3.1
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cpe:2.3:a:zeromq:libzmq:4.3.2