[VEX|VDR] add known vulnerabilities from packagist.org to the SBoM result

[jkowalleck]

CDX sbom knows vulnerabilities via

• schema extension: vulnerability
  • XML schema: https://github.com/CycloneDX/specification/blob/master/schema/ext/vulnerability-1.0.xsd
  • docs: https://cyclonedx.org/ext/vulnerability/
  • example: https://cyclonedx.org/use-cases/#vulnerability-disclosure
  • ✋ issue: there is no JSON port for this - see JSON Schema for vulnerability extension? specification#37
  • 🚧 unless we have a valid json schema for it, it is impossible to properly implement for all SBoM results
• PROPOSAL: spec 1.4 - Added vulnerabilities as part of core spec specification#91
• PROPOSAL: Proposed evolution of the vulnerability schema for discussion specification#44

packagist.org - composer's primary source - has an API to list known vulnerabilities per package.
see the docs: https://packagist.org/apidoc#list-security-advisories
implementation detail: the API might have a special handling for leading v in versions - or a special format for version-constraints(which might be handle-able by composers internal version-constraint-library)

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summary of feedback/ ideas:

• IDEA: implement a switch to enable/disable the feature - since some CI/admins don't like unnoticed web traffic to some API
• IDEA: fetch these API data and add relevant information to the resulting SBOM.
• IDEA: As the tool is often used during build processes it might be good to have an optional non-zero exit code if a vulnerability is found. Makes it easy to “break the build” if that's what people want. (thanks @coderpatros )

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if fetching data from API fails, simply prompt an error on the increased "verbosity"-log-level and dont add any vulns to the SBom result

[jkowalleck]

this request caused CycloneDX/cyclonedx-php-library#16

[jkowalleck]

this feature was originally requested, since DependencyTrack/dependency-track#798
is sill in the pipeline.

unfortunately, DependnecyTrack does not honor the known vulns from the schema extension

[jkowalleck]

implementation details: DependencyTrack/dependency-track#798 (comment)