CVE-2021-20237

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Source
https://cve.org/CVERecord?id=CVE-2021-20237
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20237.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-20237
Aliases
  • GHSA-4p5v-h92w-6wxw
Downstream
Published
2021-05-28T11:15:07Z
Modified
2026-10-24T10:50:13Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:a:zeromq:libzmq:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "4.2.0"
                        },
                        {
                            "fixed": "4.3.3"
                        },
                        {
                            "introduced": "4.2.0"
                        },
                        {
                            "fixed": "4.3.3"
                        }
                    ],
                    "source": "CPE_RANGE"
                }
            ],
            "vendor_product": "zeromq:libzmq"
        }
    ]
}
References

Affected packages

Git / github.com/zeromq/libzmq

Affected ranges

Type
GIT
Repo
https://github.com/zeromq/libzmq
Events
Introduced
097bf26e8dacf73abc2a6cdd6f9e4dce824b8208
Fixed
04f5bbedee58c538934374dc45182d8fc5926fa3
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:zeromq:libzmq:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "4.2.0"
                },
                {
                    "fixed": "4.3.3"
                }
            ],
            "source": "CPE_RANGE"
        }
    ]
}

Affected versions

v4.*
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.2.5
v4.3.0
v4.3.1
v4.3.2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-20237.json"