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CVE-2021-41119

5.3 · MEDIUM

Wire-server is the system server for the wire back-end services.

Published Apr 13, 2022CWE-400EPSS 1.36%

Overview

CVE-2021-41119 is a medium-severity vulnerability. It was published on April 13, 2022 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcs-syd.eu/posts/2021-09-11-json-vulnerabilityGitHubgithub.com/wireapp/wire-server/security/advisories/GHSA-phxv-pffh-fq2rRefcs-syd.eu/posts/2021-09-11-json-vulnerabilityGitHubgithub.com/wireapp/wire-server/security/advisories/GHSA-phxv-pffh-fq2r

How CyberStrike helps

Frequently asked questions

What is CVE-2021-41119?

CVE-2021-41119 is a medium-severity vulnerability. It was published on April 13, 2022 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2021-41119?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-41119?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-41119?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-41119 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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