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.

CVSS v3 7.5 HIGH
CVSS v2.0 4.3 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1921989	Issue Tracking Third Party Advisory
https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:zeromq:libzmq:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-05-28 11:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-20237

Mitre link : CVE-2021-20237

CVE.ORG link : CVE-2021-20237

JSON object : View

Products Affected

zeromq

libzmq

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

CWE-400

Uncontrolled Resource Consumption

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