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Hash collision in typelevel jawn

Moderate severity GitHub Reviewed Published Jan 5, 2022 in typelevel/jawn • Updated Feb 3, 2023

Package

maven org.typelevel:jawn-parser (Maven)

Affected versions

< 1.3.2

Patched versions

1.3.2

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

@rossabaker rossabaker published to typelevel/jawn Jan 5, 2022
Published by the National Vulnerability Database Jan 5, 2022
Reviewed Jan 6, 2022
Published to the GitHub Advisory Database Jan 6, 2022
Last updated Feb 3, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.117%
(47th percentile)

Weaknesses

CVE ID

CVE-2022-21653

GHSA ID

GHSA-vc89-hccf-rq55

Source code

Credits

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