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MEDIUM 5.9 Maven

Hash collision in typelevel jawn

GHSA-vc89-hccf-rq55 · CVE-2022-21653

Published · Modified

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Description

Impact

Extenders of the org.typelevel.jawn.SimpleFacade and org.typelevel.jawn.MutableFacade who don't override objectContext() are vulnerable to a hash collision attack. Most applications do not implement these traits directly, but inherit from a library:

Affected implementations include:

  • org.http4s :: http4s-play-json
  • org.typelevel :: jawn-ast (< 0.8.0)
  • org.typelevel :: jawn-play (discontinued)
  • org.typelevel :: jawn-rojoma (discontinued)
  • org.typelevel :: jawn-spray (discontinued)

Unaffected implementations include:

  • io.argonaut :: argonaut-jawn
  • io.circe :: circe-parser
  • org.typelevel :: jawn-ast (>= 0.8.0)
  • org.typelevel :: jawn-json4s (discontinued)
  • org.typelevel :: jawn-argonaut (discontinued)

Patches

jawn-parser-1.3.2 fixes the issue.

Workarounds

Override objectContext() to use a collision-safe collection. See the patch for an example in both SimpleFacade and MutableFacade.

References

Credits

  • @kag0, for the report and the patch

For more information

If you have any questions or comments about this advisory:

References

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