DEBIAN-CVE-2021-20236

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    DEBIAN-CVE-2021-20236

    Published: 28 May 2021Last Modified: 1 Sept 2026
    Upstream:
    CVE-2021-20236

    Summary:

    Details: A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

    References: https://security-tracker.debian.org/tracker/CVE-2021-20236

    Affected packages

    Package

    Name: zeromq3

    Purl: pkg:deb/debian/zeromq3?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.3.3-1

    Affected versions

    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
    DEBIAN-CVE-2021-20236 | CVE-DB