UBUNTU-CVE-2021-4235

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    UBUNTU-CVE-2021-4235

    Published: 27 Dec 2022Last Modified: 20 May 2026
    Upstream:
    CVE-2021-4235
    Aliases:
    USN-6287-1

    Summary:

    Details: Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

    References: https://ubuntu.com/security/CVE-2021-4235, https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241, https://pkg.go.dev/vuln/GO-2021-0061, https://github.com/go-yaml/yaml/pull/375, https://ubuntu.com/security/notices/USN-6287-1, https://www.cve.org/CVERecord?id=CVE-2021-4235

    Affected packages

    Package

    Name: golang-yaml.v2

    Purl: pkg:deb/ubuntu/golang-yaml.v2?arch=source&distro=esm-infra%2Fxenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.0+git20160301.0.a83829b-1ubuntu0.1~esm1

    Affected versions

    0.0+git20150627.7ad95dd-1

    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
    UBUNTU-CVE-2021-4235 | CVE-DB