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
For more information
If you have any questions or comments about this advisory feel free to email us at vulnerability-report@wire.com
Credits
We thank Posix for reporting this vulnerability
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
Workarounds
For more information
If you have any questions or comments about this advisory feel free to email us at vulnerability-report@wire.com
Credits
We thank Posix for reporting this vulnerability