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CVE-2022-21689

7.5 · HIGH

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network.

Published Jan 18, 2022CWE-400EPSS 1.35%

Overview

CVE-2022-21689 is a high-severity vulnerability. It was published on January 18, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.

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

GitHubgithub.com/onionshare/onionshare/releases/tag/v2.5GitHubgithub.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpcGitHubgithub.com/onionshare/onionshare/releases/tag/v2.5GitHubgithub.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpc

How CyberStrike helps

Frequently asked questions

What is CVE-2022-21689?

CVE-2022-21689 is a high-severity vulnerability. It was published on January 18, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-21689?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-21689?

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-2022-21689?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-21689 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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