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    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.

    Published:Sep 7, 2020
    Last Modified:Nov 21, 2024
    EPS:May 28, 2021
    EPSS Score:0.01331
    CVSS Score:7.5

    Affected Products

    Vendor
    Zeromq
    Product
    Libzmq

    Exploits

    No exploit reference

    Related CVEs

    CVE-2020-36400 (CVSS 9.8) — ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021…
    CVE-2020-15166 (CVSS 7.5) — In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public en…
    CVE-2021-20234 (CVSS 6.5) — An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.…
    CVE-2021-20235 (CVSS 8.1) — There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static…
    CVE-2019-13132 (CVSS 9.8) — In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client co…
    CVE-2019-6250 (CVSS 8.8) — A pointer overflow, with code execution, was discovered in ZeroMQ libzmq (aka 0MQ) 4.2.x and 4.3.x before 4.3.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High