CVE-2022-21689: Denial of Service in Onionshare

CVE-2022-21689 · Severity: low · CVSS 3.1 · Published 2022-01-18

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.

Technologies: onionshare-cli (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2022-21689 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2022-21689 being exploited in the wild.
How severe is CVE-2022-21689?
Low severity, with a CVSS score of 3.1, published 18 January 2022.
Which products and versions are affected?
onionshare-cli (PyPI) ECOSYSTEM:introduced=0,fixed=2.5.
Is there a fix for CVE-2022-21689?
Yes. onionshare-cli (PyPI): upgrade to 2.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2022-21689?
Check whether you run onionshare-cli (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • onionshare-cli (PyPI): upgrade to 2.5 or later
    pip install "onionshare-cli>=2.5"

Affected products

  • onionshare-cli (PyPI) ECOSYSTEM:introduced=0,fixed=2.5

Identifiers

  • CVE-2022-21689
  • GHSA-jh82-c5jw-pxpc
  • PYSEC-2022-40

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.