What is CVE-2021-41119?

CVE-2021-41119 is a vulnerability in the Wire-server system server that allows a denial of service attack via a crafted object causing a hash collision.

How severe is CVE-2021-41119?

CVE-2021-41119 has a severity rating of 7.5 (high).

How does CVE-2021-41119 affect the Wire-server software?

CVE-2021-41119 affects Wire-server releases prior to v2022-03-01.

How can CVE-2021-41119 be exploited?

CVE-2021-41119 can be exploited by sending a crafted object to the Wire-server, causing a hash collision and leading to a denial of service.

Is there a fix available for CVE-2021-41119?

Yes, the fix for CVE-2021-41119 is to upgrade to Wire-server v2022-03-01 or later.

Vulnerability/
CVE-2021-41119

high

7.5

CWE

400

13/4/2022

22/4/2025

CVE-2021-41119: DoS vulnerabiliity in wire-server json parser

First published: Wed Apr 13 2022(Updated: )

Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. 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. There are no known workarounds for this issue.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Wire	<2022-03-01

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Frequently Asked Questions

What is CVE-2021-41119?
CVE-2021-41119 is a vulnerability in the Wire-server system server that allows a denial of service attack via a crafted object causing a hash collision.
How severe is CVE-2021-41119?
CVE-2021-41119 has a severity rating of 7.5 (high).
How does CVE-2021-41119 affect the Wire-server software?
CVE-2021-41119 affects Wire-server releases prior to v2022-03-01.
How can CVE-2021-41119 be exploited?
CVE-2021-41119 can be exploited by sending a crafted object to the Wire-server, causing a hash collision and leading to a denial of service.
Is there a fix available for CVE-2021-41119?
Yes, the fix for CVE-2021-41119 is to upgrade to Wire-server v2022-03-01 or later.

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