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DoS vulnerabiliity in json parser

Moderate
comawill published GHSA-phxv-pffh-fq2r Apr 13, 2022

Package

wire-server (wire)

Affected versions

<v2022-03-01

Patched versions

v2022-03-01

Description

Impact

The used 3rd-party Library aeson stores JSON objects as hash maps (from unordered-container) that have collision problems. This allows an attacker to craft an object that causes the server to spend quadratic time parsing it, resulting in a denial of service.

Patches

  • The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services.
  • On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected.

Workarounds

  • No workarounds known

References

For more information

If you have any questions or comments about this advisory feel free to email us at vulnerability-report@wire.com

Severity

Moderate
5.3
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVE ID

CVE-2021-41119

Weaknesses

No CWEs