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Cross Site Scripting in Wire Messages

Critical
comawill published GHSA-5568-rfh8-vmhq Apr 20, 2022

Package

wire-webapp (wire)

Affected versions

< 2022-03-30-production.0

Patched versions

2022-03-30-production.0

Description

Impact

Insufficient escaping in markdown “code highlighting” in the wire-webapp resulted in the possibility of injecting and executing arbitrary HTML code and thus also JavaScript.
If a user receives and views such a malicious message, arbitrary code is injected and executed in the context of the victim. This allows the attacker to fully control the user account.

Wire-desktop clients that are connected to a vulnerable wire-webapp version are also vulnerable to this attack.

Patches

  • The issue has been fixed in wire-webapp 2022-03-30-production.0 and is already deployed on all Wire managed services.
  • On-premise instances of wire-webapp need to be updated to docker tag 2022-03-30-production.0-v0.29.2-0-d144552 or wire-server 2022-03-30 (chart/4.8.0), so that their applications are no longer affected.

Workarounds

  • No workarounds known

For more information

If you have any questions or comments about this advisory feel free to email us at [email protected]

Credits

We thank Posix for reporting this vulnerability

Severity

Critical

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
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
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:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVE ID

CVE-2022-24799

Weaknesses

No CWEs