id: GO-2022-0523
modules:
    - module: std
      versions:
        - fixed: 1.17.12
        - introduced: 1.18.0-0
          fixed: 1.18.4
      vulnerable_at: 1.18.3
      packages:
        - package: encoding/xml
          symbols:
            - Decoder.DecodeElement
            - Decoder.unmarshal
            - Decoder.unmarshalPath
summary: Stack exhaustion when unmarshaling certain documents in encoding/xml
description: |-
    Unmarshaling an XML document into a Go struct which has a nested field that uses
    the 'any' field tag can panic due to stack exhaustion.
published: 2022-07-20T20:52:06Z
references:
    - fix: https://go.dev/cl/417061
    - fix: https://go.googlesource.com/go/+/c4c1993fd2a5b26fe45c09592af6d3388a3b2e08
    - report: https://go.dev/issue/53611
    - web: https://groups.google.com/g/golang-announce/c/nqrv9fbR0zE
cve_metadata:
    id: CVE-2022-30633
    cwe: 'CWE-674: Uncontrolled Recursion'
    description: |-
        Uncontrolled recursion in Unmarshal in encoding/xml before Go 1.17.12 and Go
        1.18.4 allows an attacker to cause a panic due to stack exhaustion via
        unmarshalling an XML document into a Go struct which has a nested field that
        uses the 'any' field tag.