CVE-2022-21689

Denial of Service in Onionshare

Published Jan 18, 2022 CVSS 3.1 · 7.5 High EPSS 1.4% KEV · Not listed
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

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2022-0180 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.
Github GHSA Github GHSA GHSA-jh82-c5jw-pxpc Denial of Service in Onionshare
Ubuntu USN Ubuntu USN USN-7625-1 OnionShare vulnerabilities
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00116}

epss

{'score': 0.0012}

Type Values Removed Values Added
Metrics epss

{'score': 0.0011}

epss

{'score': 0.00116}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Apr 23, 2025, 7:10 PM
Reserved
Nov 16, 2021, 12:00 AM
Status
Modified
Published
Jan 18, 2022, 10:15 PM
Modified
Jun 17, 2026, 4:26 AM