CVE-2021-42075

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    CVE-2021-42075

    Published: 8 Nov 2021Last Modified: 9 Jul 2026

    Summary:

    Details: An issue was discovered in Barrier before 2.3.4. The barriers component (aka the server-side implementation of Barrier) does not correctly close file descriptors for established TCP connections. An unauthenticated remote attacker can thus cause file descriptor exhaustion in the server process, leading to denial of service.

    References: https://github.com/debauchee/barrier/releases/tag/v2.3.4, http://www.openwall.com/lists/oss-security/2021/11/02/4

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -c43597c27a4e57b0b599d41360bc4d29bd7bfe48

    Affected versions

    v2.3.3
    v2.3.2
    v2.3.1
    v2.3.0

    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
    CVE-2021-42075 | CVE-DB