id: GO-2021-0061
modules:
    - module: gopkg.in/yaml.v2
      versions:
        - fixed: 2.2.3
      vulnerable_at: 2.2.2
      packages:
        - package: gopkg.in/yaml.v2
          symbols:
            - decoder.unmarshal
          derived_symbols:
            - Decoder.Decode
            - Unmarshal
            - UnmarshalStrict
    - module: github.com/go-yaml/yaml
      vulnerable_at: 2.1.0+incompatible
      packages:
        - package: github.com/go-yaml/yaml
          symbols:
            - decoder.unmarshal
          derived_symbols:
            - Decoder.Decode
            - Unmarshal
            - UnmarshalStrict
summary: Denial of service in gopkg.in/yaml.v2
description: |-
    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.
published: 2021-04-14T20:04:52Z
ghsas:
    - GHSA-r88r-gmrh-7j83
credits:
    - '@simonferquel'
references:
    - fix: https://github.com/go-yaml/yaml/pull/375
    - fix: https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241
cve_metadata:
    id: CVE-2021-4235
    cwe: 'CWE 400: Uncontrolled Resource Consumption'
    references:
        - https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html